diff --git a/fcl/db/mysql/mysqldb4.pp b/fcl/db/mysql/mysqldb4.pp
index 9d8477e8fd..41c91970a6 100644
--- a/fcl/db/mysql/mysqldb4.pp
+++ b/fcl/db/mysql/mysqldb4.pp
@@ -688,12 +688,15 @@ end;
 function TMySQLDataset.InternalStrToDate(S: string): TDateTime;
 
 var
-  EY, EM, ED: Word;
+  EY, EM, ED: Longint;
 
 begin
+  SScanf(S,'%d-%d-%d',[@EY,@EM,@ED]);
+  {
   EY := StrToInt(Copy(S,1,4));
   EM := StrToInt(Copy(S,6,2));
   ED := StrToInt(Copy(S,9,2));
+  }
   if (EY = 0) or (EM = 0) or (ED = 0) then
     Result:=0
   else
@@ -703,16 +706,19 @@ end;
 function TMySQLDataset.InternalStrToDateTime(S: string): TDateTime;
 
 var
-  EY, EM, ED: Word;
-  EH, EN, ES: Word;
+  EY, EM, ED: Longint;
+  EH, EN, ES: Longint;
 
 begin
+  SScanf(S,'%d-%d-%d %d:%d:%d',[@EY,@EM,@ED,@EH,@EN,@ES]);
+  {
   EY := StrToInt(Copy(S, 1, 4));
   EM := StrToInt(Copy(S, 6, 2));
   ED := StrToInt(Copy(S, 9, 2));
   EH := StrToInt(Copy(S, 12, 2));
   EN := StrToInt(Copy(S, 15, 2));
   ES := StrToInt(Copy(S, 18, 2));
+  }
   if (EY = 0) or (EM = 0) or (ED = 0) then
     Result := 0
   else
@@ -723,28 +729,34 @@ end;
 function TMySQLDataset.InternalStrToTime(S: string): TDateTime;
 
 var
-  EH, EM, ES: Word;
+  EH, EM, ES: Longint;
 
 begin
+  SScanf(S,'%d:%d:%d',[@EH,@EM,@ES]);
+  {
   EH := StrToInt(Copy(S, 1, 2));
   EM := StrToInt(Copy(S, 4, 2));
   ES := StrToInt(Copy(S, 7, 2));
+  }
   Result := EncodeTime(EH, EM, ES, 0);
 end;
 
 function TMySQLDataset.InternalStrToTimeStamp(S: string): TDateTime;
 
 var
-  EY, EM, ED: Word;
-  EH, EN, ES: Word;
+  EY, EM, ED: longint;
+  EH, EN, ES: longint;
 
 begin
+  SScanf(S,'%d-%d-%d %d:%d:%d',[@EY,@EM,@ED,@EH,@EN,@ES]);
+  {
   EY := StrToInt(Copy(S, 1, 4));
   EM := StrToInt(Copy(S, 5, 2));
   ED := StrToInt(Copy(S, 7, 2));
   EH := StrToInt(Copy(S, 9, 2));
   EN := StrToInt(Copy(S, 11, 2));
   ES := StrToInt(Copy(S, 13, 2));
+  }
   if (EY = 0) or (EM = 0) or (ED = 0) then
     Result := 0
   else
diff --git a/rtl/objpas/sysutils/sysstr.inc b/rtl/objpas/sysutils/sysstr.inc
index d113bb85f2..04a910c0de 100644
--- a/rtl/objpas/sysutils/sysstr.inc
+++ b/rtl/objpas/sysutils/sysstr.inc
@@ -2074,12 +2074,28 @@ function sscanf(const s: string; const fmt : string;const Pointers : array of Po
     i,j,n,m : SizeInt;
     s1      : string;
 
-  function GetInt : Integer;
+  function GetInt(unsigned : boolean=false) : Integer;
     begin
       s1 := '';
       while (s[n] = ' ')  and (Length(s) > n) do
         inc(n);
-      while (s[n] in ['0'..'9', '+', '-'])
+      { read sign }
+      if (Length(s)>= n) and (s[n] in ['+', '-']) then
+        begin
+          { don't accept - when reading unsigned }
+          if unsigned and (s[n]='-') then
+            begin
+              result:=length(s1);
+              exit;
+            end
+          else
+            begin
+              s1:=s1+s[n];
+              inc(n);
+            end;
+        end;
+      { read numbers }
+      while (s[n] in ['0'..'9'])
         and (Length(s) >= n) do
         begin
           s1 := s1+s[n];