diff --git a/tmp/postinstall b/tmp/postinstall
index 59b01ca..d9242ed 100644
--- a/tmp/postinstall
+++ b/tmp/postinstall
@@ -1,9 +1,9 @@
 #!/bin/bash
 
-if [ ! getent passwd nagios 2>&1 >/dev/null ]; then
+if ! getent passwd nagios 2>&1 >/dev/null; then
 	useradd -u 52 nagios >/dev/null 2>/dev/null
 fi
-if [ ! getent group nobody 2>&1 >/dev/null ]; then
+if ! getent group nobody 2>&1 >/dev/null; then
 	groupadd -g 65534 nobody >/dev/null 2>/dev/null
 fi