diff --git a/plugins/other/vpsmem b/plugins/other/vpsmem
index 287623ef..57014783 100755
--- a/plugins/other/vpsmem
+++ b/plugins/other/vpsmem
@@ -10,13 +10,13 @@
 BEANCOUNTERS=/proc/user_beancounters
 
 if [ "$1" == "autoconf" ]; then
-	if [ -e $BEANCOUNTERS ]; then
-		echo yes
-		exit 0
-	else
-		echo no
-		exit 1
-	fi
+    if [ -e $BEANCOUNTERS ]; then
+        echo yes
+        exit 0
+    else
+        echo no
+        exit 1
+    fi
 fi
 
 if [ ! -r $BEANCOUNTERS ]; then
@@ -49,10 +49,10 @@ if [ "$1" == "config" ]; then
         limit.draw LINE2
         limit.info memory usage limit
 EOF
-	exit 0
+    exit 0
 fi
 
-if [ $# -gt 0 ]; then
+if [ -n "$1" ]; then
     echo "Invalid argument: $1" >&2
     exit 1
 fi