1 files changed, 4 insertions, 0 deletions

diff --git a/src/emacs.c b/src/emacs.c
index 143a85020c5..bd5e175bebe 100644
--- a/src/emacs.c
+++ b/src/emacs.c
@@ -346,6 +346,10 @@ main (argc, argv, envp)
       inherited_pgroup = EMACS_GETPGRP (0);
       setpgrp (0, getpid ());
     }
+#else
+#if defined (USG5) && defined (INTERRUPT_INPUT)
+  setpgrp ();
+#endif
 #endif