diff --git a/lcl/interfaces/gtk/gtkproc.inc b/lcl/interfaces/gtk/gtkproc.inc
index e556560ebb..7c65fcdee6 100644
--- a/lcl/interfaces/gtk/gtkproc.inc
+++ b/lcl/interfaces/gtk/gtkproc.inc
@@ -9283,49 +9283,6 @@ begin
   end;
 end;
 
-function DeleteAmpersands(var Str : String) : Longint;
-// convert double ampersands to single & and delete single &
-// return the position of the letter after the first deleted single ampersand
-// in the new string
-var
-  Tmp : String;
-  SrcPos, DestPos, SrcLen: integer;
-begin
-  Result := -1;
-  
-  // for speedup reasons check if Str must be changed
-  SrcLen:=length(Str);
-  SrcPos:=SrcLen;
-  while (SrcPos>=1) and (Str[SrcPos]<>'&') do dec(SrcPos);
-  if SrcPos<1 then exit;
-
-  // copy Str to Tmp and convert ampersands on the fly
-  SetLength(Tmp,SrcLen);
-  SrcPos:=1;
-  DestPos:=1;
-  while (SrcPos<=SrcLen) do begin
-    if Str[SrcPos]<>'&' then begin
-      // copy normal char
-      Tmp[DestPos]:=Str[SrcPos];
-      inc(SrcPos);
-      inc(DestPos);
-    end else begin
-      inc(SrcPos);
-      if (SrcPos<=SrcLen) and (Str[SrcPos]='&') then begin
-        // double ampersand
-        Tmp[DestPos]:='&';
-        inc(DestPos);
-        inc(SrcPos);
-      end else begin
-        // single ampersand
-        if Result<1 then Result:=DestPos;
-      end;
-    end;
-  end;
-  SetLength(Tmp,DestPos-1);
-  Str:=Tmp;
-end;
-
 {-------------------------------------------------------------------------------
   function Ampersands2Underscore(Src: PChar) : PChar;
 
diff --git a/lcl/interfaces/gtk/gtkproc.pp b/lcl/interfaces/gtk/gtkproc.pp
index e35a74f473..13eb5667fd 100644
--- a/lcl/interfaces/gtk/gtkproc.pp
+++ b/lcl/interfaces/gtk/gtkproc.pp
@@ -599,7 +599,6 @@ procedure ConnectInternalWidgetsSignals(AWidget: PGtkWidget;
 //--
   
 // accelerators
-function DeleteAmpersands(var Str: String): Longint;
 function Ampersands2Underscore(Src: PChar): PChar;
 function Ampersands2Underscore(const ASource: String): String;
 function RemoveAmpersands(Src: PChar; LineLength: Longint): PChar;
diff --git a/lcl/interfaces/gtk/gtkwinapi.inc b/lcl/interfaces/gtk/gtkwinapi.inc
index 80ddf49e73..dac77223b0 100644
--- a/lcl/interfaces/gtk/gtkwinapi.inc
+++ b/lcl/interfaces/gtk/gtkwinapi.inc
@@ -3084,11 +3084,7 @@ begin
       AStr := StringReplace(AStr, #9, TabString, [rfReplaceAll]);
 
     if (Flags and DT_NOPREFIX) <> DT_NOPREFIX then
-    begin
-      pIndex := DeleteAmpersands(AStr);
-      if pIndex > Length(AStr) then
-        pIndex := -1; // String ended in '&', which was deleted
-    end
+      pIndex := DeleteAmpersands(AStr)
     else
       pIndex := -1;
 
diff --git a/lcl/interfaces/gtk2/gtk2proc.inc b/lcl/interfaces/gtk2/gtk2proc.inc
index fe270e70a2..5362b78cba 100644
--- a/lcl/interfaces/gtk2/gtk2proc.inc
+++ b/lcl/interfaces/gtk2/gtk2proc.inc
@@ -8992,49 +8992,6 @@ begin
   end;
 end;
 
-function DeleteAmpersands(var Str : String) : Longint;
-// convert double ampersands to single & and delete single &
-// return the position of the letter after the first deleted single ampersand
-// in the new string
-var
-  Tmp : String;
-  SrcPos, DestPos, SrcLen: integer;
-begin
-  Result := -1;
-  
-  // for speedup reasons check if Str must be changed
-  SrcLen:=length(Str);
-  SrcPos:=SrcLen;
-  while (SrcPos>=1) and (Str[SrcPos]<>'&') do dec(SrcPos);
-  if SrcPos<1 then exit;
-
-  // copy Str to Tmp and convert ampersands on the fly
-  SetLength(Tmp,SrcLen);
-  SrcPos:=1;
-  DestPos:=1;
-  while (SrcPos<=SrcLen) do begin
-    if Str[SrcPos]<>'&' then begin
-      // copy normal char
-      Tmp[DestPos]:=Str[SrcPos];
-      inc(SrcPos);
-      inc(DestPos);
-    end else begin
-      inc(SrcPos);
-      if (SrcPos<=SrcLen) and (Str[SrcPos]='&') then begin
-        // double ampersand
-        Tmp[DestPos]:='&';
-        inc(DestPos);
-        inc(SrcPos);
-      end else begin
-        // single ampersand
-        if Result<1 then Result:=DestPos;
-      end;
-    end;
-  end;
-  SetLength(Tmp,DestPos-1);
-  Str:=Tmp;
-end;
-
 {-------------------------------------------------------------------------------
   function Ampersands2Underscore(Src: PChar) : PChar;
 
diff --git a/lcl/interfaces/gtk2/gtk2proc.pp b/lcl/interfaces/gtk2/gtk2proc.pp
index 7e37fda227..e038016222 100644
--- a/lcl/interfaces/gtk2/gtk2proc.pp
+++ b/lcl/interfaces/gtk2/gtk2proc.pp
@@ -586,7 +586,6 @@ procedure ConnectInternalWidgetsSignals(AWidget: PGtkWidget;
 //--
 
 // accelerators
-function DeleteAmpersands(var Str: String): Longint;
 function Ampersands2Underscore(Src: PChar): PChar;
 function Ampersands2Underscore(const ASource: String): String;
 function EscapeUnderscores(const Str: String): String; inline;
diff --git a/lcl/interfaces/gtk2/gtk2winapi.inc b/lcl/interfaces/gtk2/gtk2winapi.inc
index e9ac749c65..6222c87248 100644
--- a/lcl/interfaces/gtk2/gtk2winapi.inc
+++ b/lcl/interfaces/gtk2/gtk2winapi.inc
@@ -2730,11 +2730,7 @@ begin
       AStr := StringReplace(AStr, #9, TabString, [rfReplaceAll]);
 
     if (Flags and DT_NOPREFIX) <> DT_NOPREFIX then
-    begin
-      pIndex := DeleteAmpersands(AStr);
-      if pIndex > Length(AStr) then
-        pIndex := -1; // String ended in '&', which was deleted
-    end
+      pIndex := DeleteAmpersands(AStr)
     else
       pIndex := -1;
 
diff --git a/lcl/lclproc.pas b/lcl/lclproc.pas
index e32cf3e33d..947280f018 100644
--- a/lcl/lclproc.pas
+++ b/lcl/lclproc.pas
@@ -130,7 +130,8 @@ procedure MakeMinMax(var i1, i2: integer);
 procedure CalculateLeftTopWidthHeight(X1,Y1,X2,Y2: integer;
   out Left,Top,Width,Height: integer);
 
-function DeleteAmpersands(var Str : String) : Longint;
+// Ampersands
+function DeleteAmpersands(var Str : String) : Integer;
 
 function ComparePointers(p1, p2: Pointer): integer; inline;
 function CompareHandles(h1, h2: THandle): integer;
@@ -344,10 +345,10 @@ var
   DebugNestAtBOL: Boolean;
   {$ENDIF}
 
-function DeleteAmpersands(var Str : String) : Longint;
-// Replace all &x with x
-// and return the position of the first ampersand letter in the resulting Str.
-// double ampersands && are converted to a single & and are ignored.
+function DeleteAmpersands(var Str : String) : Integer;
+// Replace all &x with x and return the position of the first accelerator letter in
+//  the resulting Str, meaning the letter following the first & in the original Str.
+// Double ampersands && are converted to a single & and ignored.
 var
   SrcPos, DestPos, SrcLen: Integer;
 begin
@@ -359,7 +360,7 @@ begin
     if (Str[SrcPos]='&') and (SrcPos<SrcLen) then begin
       // & found
       inc(SrcPos); // skip &
-      if (Str[SrcPos]<>'&') and (Result<1) then
+      if (Str[SrcPos]<>'&') and (Result<1) then  // Ignore && as accelerator
         Result:=DestPos;
     end;
     if DestPos<SrcPos then