diff --git a/components/lazutils/lazfileutils.inc b/components/lazutils/lazfileutils.inc
index e709e2e27b..a9bf47e48a 100644
--- a/components/lazutils/lazfileutils.inc
+++ b/components/lazutils/lazfileutils.inc
@@ -3,12 +3,18 @@
 
 function ResolveDots(const AFilename: string): String;
 //trim double path delims and expand special dirs like .. and .
-//on Windows change also '/' to '\'
+//on Windows change also '/' to '\' except for filenames starting with '\\?\'
 var SrcPos, DestPos, l, DirStart: integer;
   c: char;
   MacroPos: LongInt;
+  {$ifdef windows}
+  CannotTouchSeps: Boolean;
+  {$endif}
 begin
   Result:=AFilename;
+  {$ifdef windows}
+  CannotTouchSeps := Pos('\\?\', AFilename) = 1;
+  {$endif}
 
   l:=length(AFilename);
   SrcPos:=1;
@@ -20,7 +26,7 @@ begin
     c:=AFilename[SrcPos];
     {$ifdef windows}
     //change / to \. The WinApi accepts both, but it leads to strange effects in other places
-    if (c='/') then c := PathDelim;
+    if (c='/') and not CannotTouchSeps then c := PathDelim;
     {$endif}
     // check for double path delims
     if (c=PathDelim) then begin
@@ -30,7 +36,7 @@ begin
       {$ELSE}
       if (DestPos>1)
       {$ENDIF}
-      and (Result[DestPos-1]=PathDelim) then begin
+      and (Result[DestPos-1]=PathDelim) and not CannotTouchSeps then begin
         // skip second PathDelim
         continue;
       end;
@@ -127,7 +133,7 @@ begin
       c:=AFilename[SrcPos];
       {$ifdef windows}
       //change / to \. The WinApi accepts both, but it leads to strange effects in other places
-      if (c='/') then c := PathDelim;
+      if (c='/')  and not CannotTouchSeps then c := PathDelim;
       {$endif}
       if c=PathDelim then break;
     until false;