diff --git a/dlls/mapi32/sendmail.c b/dlls/mapi32/sendmail.c
index a92fe64b30c..eb954a504cb 100644
--- a/dlls/mapi32/sendmail.c
+++ b/dlls/mapi32/sendmail.c
@@ -27,7 +27,6 @@
 #include "windef.h"
 #include "winbase.h"
 #include "winerror.h"
-#include "winnls.h"
 #include "objbase.h"
 #include "mapi.h"
 #include "winreg.h"