diff --git a/usr.bin/less/lesspipe.sh b/usr.bin/less/lesspipe.sh
index 6af7db3304ee..f8202ff386db 100644
--- a/usr.bin/less/lesspipe.sh
+++ b/usr.bin/less/lesspipe.sh
@@ -5,12 +5,12 @@
 
 case "$1" in
 	*.Z)
-		exec uncompress -c $1	2>/dev/null
+		exec uncompress -c "$1"	2>/dev/null
 		;;
 	*.gz)
-		exec gzip -d -c $1	2>/dev/null
+		exec gzip -d -c "$1"	2>/dev/null
 		;;
 	*.bz2)
-		exec bzip2 -d -c $1	2>/dev/null
+		exec bzip2 -d -c "$1"	2>/dev/null
 		;;
 esac