diff --git a/bash_completion b/bash_completion
index 2af76cd8..f455992a 100644
--- a/bash_completion
+++ b/bash_completion
@@ -1,6 +1,6 @@
 #   bash_completion - some programmable completion functions for bash 2.05b
 #
-#   $Id: bash_completion,v 1.642 2003/10/20 21:05:20 ianmacd Exp $
+#   $Id: bash_completion,v 1.643 2003/10/20 21:07:58 ianmacd Exp $
 #
 #   Copyright (C) Ian Macdonald <ian@caliban.org>
 #
@@ -28,7 +28,7 @@
 
 # Alter the following to reflect the location of this file
 #
-if [ -n "$FUNCNAME" ]; then
+if [ -n "${FUNCNAME:-}" ]; then
 	# we're being sourced from within a function, so we can't use
 	# 'declare', as this will create local variables within a function
 	BASH_COMPLETION=${BASH_COMPLETION:-/etc/bash_completion} 2>/dev/null