diff --git a/src/ce_synmemo.pas b/src/ce_synmemo.pas
index 11a46051..de0321e5 100644
--- a/src/ce_synmemo.pas
+++ b/src/ce_synmemo.pas
@@ -1079,6 +1079,7 @@ end;
 
 destructor TCESynMemo.destroy;
 begin
+  application.RemoveOnDeactivateHandler(@handleModalBeginning);
   saveCache;
 
   //fIndentGuideMarkup.Free;