diff --git a/components/richmemo/win32/win32richmemoproc.pas b/components/richmemo/win32/win32richmemoproc.pas
index e8e655e4f..1f4db6485 100644
--- a/components/richmemo/win32/win32richmemoproc.pas
+++ b/components/richmemo/win32/win32richmemoproc.pas
@@ -321,7 +321,7 @@ begin
 end;
 
 type
-  TEditStream_ = record
+  TEditStream_ = packed record
     dwCookie    : PDWORD;
     dwError     : DWORD;
     pfnCallback : EDITSTREAMCALLBACK;