diff --git a/entrypoint.sh b/entrypoint.sh
index 3907882..c0d7729 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-set -eu
+set -e
 
 if [[ -z "$GITHUB_TOKEN" ]]; then
   echo "Set the GITHUB_TOKEN env variable."
@@ -16,6 +16,17 @@ if [[ -z "$GITHUB_EVENT_PATH" ]]; then
   exit 1
 fi
 
+addLabel=$ADD_LABEL
+if [[ -n "$LABEL_NAME" ]]; then
+  echo "Warning: Plase define the ADD_LABEL variable instead of the deprecated LABEL_NAME."
+  addLabel=$LABEL_NAME
+fi
+
+if [[ -z "$addLabel" ]]; then
+  echo "Set the ADD_LABEL or the LABEL_NAME env variable."
+  exit 1
+fi
+
 URI="https://api.github.com"
 API_HEADER="Accept: application/vnd.github.v3+json"
 AUTH_HEADER="Authorization: token ${GITHUB_TOKEN}"
@@ -44,12 +55,6 @@ label_when_approved() {
     if [[ "$approvals" == "$APPROVALS" ]]; then
       echo "Labeling pull request"
 
-      addLabel=$ADD_LABEL
-      if [[ -n "$LABEL_NAME" ]]; then
-        echo "Plase define the ADD_LABEL variable instead of the deprecated LABEL_NAME."
-        addLabel=$LABEL_NAME
-      fi
-
       curl -sSL \
         -H "${AUTH_HEADER}" \
         -H "${API_HEADER}" \