diff --git a/components/codetools/definetemplates.pas b/components/codetools/definetemplates.pas
index dc045846c0..49e00c567a 100644
--- a/components/codetools/definetemplates.pas
+++ b/components/codetools/definetemplates.pas
@@ -7591,6 +7591,7 @@ begin
   ClearUnitToSrcCaches;
   FreeAndNil(FConfigCaches);
   FreeAndNil(FSourceCaches);
+  FreeAndNil(fUnitToSrcCaches);
   inherited Destroy;
 end;