diff --git a/rtl/sinclairql/qdos.inc b/rtl/sinclairql/qdos.inc
index 2f03d1d9c2..7700cc42f0 100644
--- a/rtl/sinclairql/qdos.inc
+++ b/rtl/sinclairql/qdos.inc
@@ -32,7 +32,7 @@ asm
   movem.l (sp)+,d2-d3/a2-a3
 end;
 
-function mt_inf(sys_vars: ppchar; ver_ascii: plongint): Tjobid; assembler; nostackframe; public name '_mt_inf';
+function mt_inf(sys_vars: PPAnsiChar; ver_ascii: plongint): Tjobid; assembler; nostackframe; public name '_mt_inf';
 asm
   move.l  d2,-(sp)
   move.l  sys_vars,-(sp)
@@ -115,10 +115,10 @@ asm
   movem.l (sp)+,d2-d3
 end;
 
-function io_open(name: pchar; mode: longint): Tchanid; public name '_io_open';
+function io_open(name: PAnsiChar; mode: longint): Tchanid; public name '_io_open';
 var
   len: longint;
-  name_qlstr: array[0..63] of char;
+  name_qlstr: array[0..63] of AnsiChar;
 begin
   len:=length(name);
   if len > length(name_qlstr)-2 then
@@ -149,10 +149,10 @@ asm
   movem.l (sp)+,d2-d3
 end;
 
-function io_delet(name: pchar): Tchanid; public name '_io_delet';
+function io_delet(name: PAnsiChar): Tchanid; public name '_io_delet';
 var
   len: longint;
-  name_qlstr: array[0..63] of char;
+  name_qlstr: array[0..63] of AnsiChar;
 begin
   len:=length(name);
   if len > length(name_qlstr)-2 then
@@ -228,7 +228,7 @@ begin
   io_fstrg := io_fetch(chan, timeout, buf, len, _IO_FSTRG);
 end;
 
-function io_sbyte(chan: Tchanid; timeout: Ttimeout; c: char): longint; assembler; public name '_io_sbyte';
+function io_sbyte(chan: Tchanid; timeout: Ttimeout; c: AnsiChar): longint; assembler; public name '_io_sbyte';
 asm
   move.l d3,-(sp)
   move.w timeout,d3
@@ -339,10 +339,10 @@ asm
   move.l (sp)+,d3
 end;
 
-function fs_rename(chan: Tchanid; new_name: pchar): longint; public name '_fs_rename';
+function fs_rename(chan: Tchanid; new_name: PAnsiChar): longint; public name '_fs_rename';
 var
   len: longint;
-  new_name_qlstr: array[0..63] of char;
+  new_name_qlstr: array[0..63] of AnsiChar;
 begin
   len:=length(new_name);
   if len > length(new_name_qlstr)-2 then
diff --git a/rtl/sinclairql/qdosfuncs.inc b/rtl/sinclairql/qdosfuncs.inc
index 050ba605d3..513a09c11c 100644
--- a/rtl/sinclairql/qdosfuncs.inc
+++ b/rtl/sinclairql/qdosfuncs.inc
@@ -15,7 +15,7 @@
 
 
 procedure mt_frjob(jobID: Tjobid; exitCode: longint); external name '_mt_frjob';
-function mt_inf(sys_vars: ppchar; ver_ascii: plongint): Tjobid; external name '_mt_inf';
+function mt_inf(sys_vars: PPAnsiChar; ver_ascii: plongint): Tjobid; external name '_mt_inf';
 
 procedure mt_dmode(s_mode: pword; d_type: pword); external name '_mt_dmode';
 
@@ -23,21 +23,21 @@ function mt_alchp(size: dword; sizegot: pdword; jobid: Tjobid): pointer; externa
 procedure mt_rechp(area: pointer); external name '_mt_rechp';
 
 function io_open_qlstr(name_qlstr: pointer; mode: longint): Tchanid; external name '_io_open_qlstr';
-function io_open(name: pchar; mode: longint): Tchanid; external name '_io_open';
+function io_open(name: PAnsiChar; mode: longint): Tchanid; external name '_io_open';
 function io_close(chan: Tchanid): longint; external name '_io_close';
-function io_delet(name: pchar): longint; external name '_io_delet';
+function io_delet(name: PAnsiChar): longint; external name '_io_delet';
 
 function io_fbyte(chan: Tchanid; timeout: Ttimeout): longint; external name '_io_fbyte';
 function io_fline(chan: Tchanid; timeout: Ttimeout; buf: pointer; len: word): longint; external name '_io_fline';
 function io_fstrg(chan: Tchanid; timeout: Ttimeout; buf: pointer; len: word): longint; external name '_io_fstrg';
-function io_sbyte(chan: Tchanid; timeout: Ttimeout; c: char): longint; external name '_io_sbyte';
+function io_sbyte(chan: Tchanid; timeout: Ttimeout; c: AnsiChar): longint; external name '_io_sbyte';
 function io_sstrg(chan: Tchanid; timeout: Ttimeout; buf: pointer; len: word): longint; external name '_io_sstrg';
 
 function fs_posab(chan: Tchanid; var new_pos: longint): longint; external name '_fs_posab';
 function fs_posre(chan: Tchanid; var new_pos: longint): longint; external name '_fs_posre';
 function fs_headr(chan: Tchanid; buf: pointer; buf_size: word): longint; external name '_fs_headr';
 function fs_rename_qlstr(chan: Tchanid; new_name_as_qlstr: pointer): longint; external name '_fs_rename_qlstr';
-function fs_rename(chan: Tchanid; new_name: pchar): longint; external name '_fs_rename';
+function fs_rename(chan: Tchanid; new_name: PAnsiChar): longint; external name '_fs_rename';
 function fs_truncate(chan: Tchanid): longint; external name '_fs_truncate';
 function fs_mkdir(chan: Tchanid): longint; external name '_iof_mkdr'; { SMS }
 
diff --git a/rtl/sinclairql/smsfuncs.inc b/rtl/sinclairql/smsfuncs.inc
index 31e3699a97..7c1f7979fd 100644
--- a/rtl/sinclairql/smsfuncs.inc
+++ b/rtl/sinclairql/smsfuncs.inc
@@ -13,6 +13,6 @@
 
  **********************************************************************}
 
-function sms_info(sys_vars: ppchar; ver_ascii: plongint): Tjobid; external name '_mt_inf';
+function sms_info(sys_vars: PPAnsiChar; ver_ascii: plongint): Tjobid; external name '_mt_inf';
 function iob_fbyt(chan: Tchanid; timeout: Ttimeout): longint; external name '_io_fbyte';
 function iof_mkdr(chan: Tchanid): longint; external name '_iof_mkdr';
diff --git a/rtl/sinclairql/sysdir.inc b/rtl/sinclairql/sysdir.inc
index aaee2f8886..046074bdc3 100644
--- a/rtl/sinclairql/sysdir.inc
+++ b/rtl/sinclairql/sysdir.inc
@@ -26,7 +26,7 @@ begin
     directory. The file should be opened as a new file as
     errors occur if the file exists when creating a new
     directory when it's already there. }
-  chanId := io_open(PChar(s), Q_OPEN_OVER);
+  chanId := io_open(PAnsiChar(s), Q_OPEN_OVER);
   if chanId < 0 then
     begin
       Error2InOutRes(chanId); 
@@ -53,7 +53,7 @@ begin
     or directory name that is not present. It should return
     ERR_NF. (At least on RAM_/FLP_ or WIN_)
   }
-  Error2InOutRes(io_delet(pchar(s)));
+  Error2InOutRes(io_delet(PAnsiChar(s)));
 end;
 
 
diff --git a/rtl/sinclairql/sysfile.inc b/rtl/sinclairql/sysfile.inc
index 3ade000fa0..3218dd2852 100644
--- a/rtl/sinclairql/sysfile.inc
+++ b/rtl/sinclairql/sysfile.inc
@@ -26,13 +26,13 @@ begin
 end;
 
 { delete a file, given its name }
-procedure do_erase(p : pchar; pchangeable: boolean);
+procedure do_erase(p : PAnsiChar; pchangeable: boolean);
 begin
   Error2InOutRes(io_delet(p));
 end;
 
 
-procedure do_rename(p1,p2 : pchar; p1changeable, p2changeable: boolean);
+procedure do_rename(p1,p2 : PAnsiChar; p1changeable, p2changeable: boolean);
 var
   chanId: longint;
   res: longint;
@@ -172,7 +172,7 @@ begin
 end;
 
 
-procedure do_open(var f;p:pchar;flags:longint; pchangeable: boolean);
+procedure do_open(var f;p:PAnsiChar;flags:longint; pchangeable: boolean);
 {
   filerec and textrec have both handle and mode as the first items so
   they could use the same routine for opening/creating.
diff --git a/rtl/sinclairql/system.pp b/rtl/sinclairql/system.pp
index 4f064264ad..45ed9e8e80 100644
--- a/rtl/sinclairql/system.pp
+++ b/rtl/sinclairql/system.pp
@@ -36,8 +36,8 @@ const
     DriveSeparator = ':';
     ExtensionSeparator = '.';
     PathSeparator = ';';
-    AllowDirectorySeparators : set of char = ['\','/'];
-    AllowDriveSeparators : set of char = [':'];
+    AllowDirectorySeparators : set of AnsiChar = ['\','/'];
+    AllowDriveSeparators : set of AnsiChar = [':'];
     FileNameCaseSensitive = false;
     FileNameCasePreserving = false;
     maxExitCode = 255;
@@ -57,9 +57,9 @@ var
     QL_ChannelIDNum : word;
     QL_ChannelIDs: pdword;
     QL_CommandLineLen : word;
-    QL_CommandLine : pchar;
+    QL_CommandLine : PAnsiChar;
 
-    argv: PPChar;
+    argv: PPAnsiChar;
     argc: Longint;
 
     {$if defined(FPUSOFT)}
@@ -84,7 +84,7 @@ function SetQLJobName(const s: string): longint;
 function GetQLJobName: string;
 function GetQLJobNamePtr: pointer;
 
-procedure SetQLDefaultConExitMessage(const msg: PChar);
+procedure SetQLDefaultConExitMessage(const msg: PAnsiChar);
 
 implementation
 
@@ -129,7 +129,7 @@ end;
 *****************************************************************************}
 
 var
-  args: PChar;
+  args: PAnsiChar;
 
 { number of args }
 function ParamCount: LongInt;
@@ -149,7 +149,7 @@ end;
 procedure SysInitParamsAndEnv;
 var
   i,j : longint;
-  c : char;
+  c : AnsiChar;
   argv_size : longint;
 const
   word_separators=[' ',#0];
@@ -277,9 +277,9 @@ begin
 end;
 
 const
-  QLDefaultConExitMessage: PChar = 'Press any key to exit';
+  QLDefaultConExitMessage: PAnsiChar = 'Press any key to exit';
 
-procedure SetQLDefaultConExitMessage(const msg: PChar);
+procedure SetQLDefaultConExitMessage(const msg: PAnsiChar);
 begin
   QLDefaultConExitMessage:=msg;
 end;
diff --git a/rtl/sinclairql/sysutils.pp b/rtl/sinclairql/sysutils.pp
index 2e547c766b..7b8d05815f 100644
--- a/rtl/sinclairql/sysutils.pp
+++ b/rtl/sinclairql/sysutils.pp
@@ -75,7 +75,7 @@ begin
     fmOpenWrite: QLMode :=  Q_OPEN_OVER;
     fmOpenReadWrite: QLMode := Q_OPEN;
   end;
-  FileOpen := io_open(pchar(Filename), QLMode);
+  FileOpen := io_open(PAnsiChar(Filename), QLMode);
   if FileOpen < 0 then
     FileOpen:=-1;
 end;
@@ -109,7 +109,7 @@ end;
 function FileCreate(const FileName: RawByteString) : THandle;
 begin
   DeleteFile(FileName);
-  FileCreate := io_open(pchar(FileName), Q_OPEN_NEW);
+  FileCreate := io_open(PAnsiChar(FileName), Q_OPEN_NEW);
   if FileCreate < 0 then
     FileCreate:=-1;
 end;
@@ -215,7 +215,7 @@ end;
 function DeleteFile(const FileName: RawByteString) : Boolean;
 begin
   DeleteFile:=false;
-  if io_delet(pchar(Filename)) < 0 then
+  if io_delet(PAnsiChar(Filename)) < 0 then
     exit;
   DeleteFile := True;
 end;
@@ -231,7 +231,7 @@ begin
   if Handle = -1 then
     exit;
 
-  QLerr := fs_rename(Handle, pchar(NewName));
+  QLerr := fs_rename(Handle, PAnsiChar(NewName));
   FileClose(Handle);
   if QLerr >= 0 then
     RenameFile := true;