diff --git a/api/x_opengl.C b/api/x_opengl.C
index 7548d9b129..9a66070a93 100644
--- a/api/x_opengl.C
+++ b/api/x_opengl.C
@@ -593,7 +593,7 @@ void xwin_graphics_event_loop() {
 
     if (debug) fprintf(stderr, "Direct call to xwin_graphics_event_loop()\n");
 
-    struct sigaction sa;
+    struct sigaction sa = {0};
     memset(&sa, 0, sizeof(sa));
     sa.sa_handler = restart_sig;
     sa.sa_flags = SA_RESTART;
diff --git a/checkin_notes b/checkin_notes
index 99698a1a5f..af41cbc6d1 100755
--- a/checkin_notes
+++ b/checkin_notes
@@ -8383,3 +8383,11 @@ David  11 Sept 2007
 
     html/ops/
         user_graph.php
+
+Reinhard 11 Sept 2007
+    - initialize local 'struct sigaction' variable to zero in xwin_graphics_event_loop()
+
+    api/
+	x_opengl.C
+
+    	
\ No newline at end of file