diff --git a/home/dotfiles/profile b/home/dotfiles/profile
index f84caa9..826a480 100644
--- a/home/dotfiles/profile
+++ b/home/dotfiles/profile
@@ -48,7 +48,7 @@ log() {
 			done
 		fi
 		prefix=" "
-		if [ $NO_SPACE_PREFIX -gt 0 ]; then
+		if [ ${NO_SPACE_PREFIX:-0} -gt 0 ]; then
 			prefix=""
 		fi
 		echo "$*" | while IFS= read -r line; do