diff --git a/cde/programs/dtsession/SmUI.c b/cde/programs/dtsession/SmUI.c
index 1c7a6d0fa..ada475681 100644
--- a/cde/programs/dtsession/SmUI.c
+++ b/cde/programs/dtsession/SmUI.c
@@ -1157,6 +1157,8 @@ ImmediateExit(
      */
 #if !defined(SVR4) && !defined(sco)
     old = sigblock(sigmask(SIGTERM));
+    sigblock(sigmask(SIGHUP));
+    sigblock(sigmask(SIGPIPE));
 #else
     old = sighold(SIGTERM);
 #endif