diff --git a/evocheck.sh b/evocheck.sh
index c3cb6be..4fc9a8c 100755
--- a/evocheck.sh
+++ b/evocheck.sh
@@ -144,7 +144,7 @@ is_pack_samba(){
 
 is_installed(){
     for pkg in $*; do
-            dpkg -l $pkg 2>/dev/null | grep -q -E ^(i|h)i || return 1
+            dpkg -l $pkg 2>/dev/null | grep -q -E '^(i|h)i' || return 1
     done
 }