diff --git a/scripts/is_contract.sh b/scripts/is_contract.sh
index 2a7dce0d696..389d3764567 100755
--- a/scripts/is_contract.sh
+++ b/scripts/is_contract.sh
@@ -43,7 +43,7 @@ if [ -z "$SOURCE_PATH" ]; then
 fi
 
 # Check for the #[ink::contract] macro in the source file
-if grep -qE '^#\[(::)?ink::contract([^]]*)\]' "$SOURCE_PATH"; then
+grep -q '#\s*\[\(::\)\?ink::contract' "$SOURCE_PATH"; then
     exit 0
 else
     exit 1