diff --git a/action.yml b/action.yml
index 03a3ecd0..0bf27d7e 100644
--- a/action.yml
+++ b/action.yml
@@ -127,7 +127,7 @@ runs:
           ALL_CHANGED=$(echo "$ALL_CHANGED" | sed -E 's/(${{ inputs.separator }})$//')
           ALL_MODIFIED_FILES=$(echo "$ALL_MODIFIED_FILES" | sed -E 's/(${{ inputs.separator }})$//')
           
-          OUTPUT_ALL_MODIFIED_FILES=$(echo $ALL_MODIFIED_FILES | sed "s/(${{ inputs.separator }})/ /g")
+          OUTPUT_ALL_MODIFIED_FILES=$(echo $ALL_MODIFIED_FILES | sed "s/${{ inputs.separator }}/ /g")
           ALL_INPUT_FILES=$(echo $INPUT_FILES | sed "s/\n/ /g")
           
           echo "Files: $OUTPUT_ALL_MODIFIED_FILES != $ALL_INPUT_FILES"