diff --git a/src/backend/utils/misc/ps_status.c b/src/backend/utils/misc/ps_status.c
index 20b717e5be..ec314c03f5 100644
--- a/src/backend/utils/misc/ps_status.c
+++ b/src/backend/utils/misc/ps_status.c
@@ -443,6 +443,7 @@ get_ps_display(int *displen)
 
 	return ps_buffer + ps_buffer_fixed_size;
 #else
+	*displen = 0;
 	return "";
 #endif
 }