diff --git a/components/codetools/fpc.errore.msg b/components/codetools/fpc.errore.msg
index e360ec53a3..05b6552548 100644
--- a/components/codetools/fpc.errore.msg
+++ b/components/codetools/fpc.errore.msg
@@ -32,8 +32,12 @@ general_t_objectpath=01007_T_Using object path: $1
 option_using_file=11026_T_Reading options from file $1
 % Options are also read from this file
 
-% Options are also read from this environment string
 option_handling_option=11028_D_Handling option "$1"
+% Options are also read from this environment string
+
+unit_u_recompile_crc_change=10028_U_Recompiling $1, checksum changed for $2
+% The unit is recompiled because the checksum of a unit it depends on has
+% changed.
 
 # end.
 
diff --git a/ide/outputfilter.pas b/ide/outputfilter.pas
index 39ba5b59d6..b4b578a50c 100644
--- a/ide/outputfilter.pas
+++ b/ide/outputfilter.pas
@@ -627,6 +627,23 @@ var i, j, FilenameEndPos: integer;
     DoAddFilteredLine(copy(s,OldStart,length(s)));
   end;
   
+  { example:
+    Recompiling GtkInt, checksum changed for gdk2x
+  }
+  function CheckForRecompilingChecksumChangedMessages(p: integer): boolean;
+  var
+    OldStart: LongInt;
+  begin
+    Result:=false;
+    OldStart:=p;
+    if not CompStr('Recompiling ',s,p) then exit;
+    while (p<=length(s)) and (s[p]<>',') do
+      inc(p);
+    if not CompStr(', checksum changed for ',s,p) then exit;
+    Result:=true;
+    DoAddFilteredLine(copy(s,OldStart,length(s)));
+  end;
+  
   { example:
     ...\windres.exe: warning: ...
   }
@@ -684,7 +701,10 @@ begin
   // check for linking errors
   Result:=CheckForLinkingErrors(i);
   if Result then exit;
-  // cehck for windres errors
+  // check for Recompiling, checksum changed
+  Result:=CheckForRecompilingChecksumChangedMessages(i);
+  if Result then exit;
+  // check for windres errors
   Result := CheckForWindresErrors(i);
   if Result then Exit;