diff --git a/cde/programs/dtmail/dtmail/options_util.C b/cde/programs/dtmail/dtmail/options_util.C
index e40d2afc7..b2bfd3642 100644
--- a/cde/programs/dtmail/dtmail/options_util.C
+++ b/cde/programs/dtmail/dtmail/options_util.C
@@ -23,6 +23,7 @@
 /* $TOG: options_util.C /main/8 1999/07/07 13:20:04 mgreess $ */
 #include <ctype.h>
 #include <stdlib.h>
+#include <stdint.h>
 #include <X11/Intrinsic.h>
 #include <Xm/DialogS.h>
 #include <Xm/Form.h>