diff --git a/x11-toolkits/open-motif-devel/files/patch-clients_mwm_WmError.h b/x11-toolkits/open-motif-devel/files/patch-clients_mwm_WmError.h
new file mode 100644
index 0000000000000..c25975f099a81
--- /dev/null
+++ b/x11-toolkits/open-motif-devel/files/patch-clients_mwm_WmError.h
@@ -0,0 +1,11 @@
+--- clients/mwm/WmError.h.orig	2017-08-17 00:38:43 UTC
++++ clients/mwm/WmError.h
+@@ -32,7 +32,7 @@ extern int WmXIOErrorHandler (Display *display);
+ extern void WmInitErrorHandler (Display *display);
+ extern int WmXErrorHandler (Display *display, XErrorEvent *errorEvent);
+ extern int WmXIOErrorHandler (Display *display);
+-extern void WmXtErrorHandler (char *message);
++extern void WmXtErrorHandler (char *message) _X_NORETURN;
+ extern void WmXtWarningHandler (char *message);
+ extern void Warning (char *message);
+ #ifndef NO_MESSAGE_CATALOG
diff --git a/x11-toolkits/open-motif/files/patch-clients_mwm_WmError.h b/x11-toolkits/open-motif/files/patch-clients_mwm_WmError.h
new file mode 100644
index 0000000000000..c25975f099a81
--- /dev/null
+++ b/x11-toolkits/open-motif/files/patch-clients_mwm_WmError.h
@@ -0,0 +1,11 @@
+--- clients/mwm/WmError.h.orig	2017-08-17 00:38:43 UTC
++++ clients/mwm/WmError.h
+@@ -32,7 +32,7 @@ extern int WmXIOErrorHandler (Display *display);
+ extern void WmInitErrorHandler (Display *display);
+ extern int WmXErrorHandler (Display *display, XErrorEvent *errorEvent);
+ extern int WmXIOErrorHandler (Display *display);
+-extern void WmXtErrorHandler (char *message);
++extern void WmXtErrorHandler (char *message) _X_NORETURN;
+ extern void WmXtWarningHandler (char *message);
+ extern void Warning (char *message);
+ #ifndef NO_MESSAGE_CATALOG