diff --git a/evocheck/files/evocheck.sh b/evocheck/files/evocheck.sh
index 1eaf08ae..200f0471 100644
--- a/evocheck/files/evocheck.sh
+++ b/evocheck/files/evocheck.sh
@@ -143,7 +143,7 @@ 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
 }