diff --git a/.github/workflows/Azure.yml b/.github/workflows/Azure.yml
index 04f569976..94573f06a 100644
--- a/.github/workflows/Azure.yml
+++ b/.github/workflows/Azure.yml
@@ -54,7 +54,7 @@ jobs:
         shell: bash
         run: |
             GIT_BRANCH="${GITHUB_REF##*/}"
-            GIT_BRANCH=`expr "$GITHUB_REF" : '\([0-9]*\.[0-9]*\).*'`
+            GIT_BRANCH=`expr "${GIT_BRANCH}" : '\([0-9]*\.[0-9]*\).*'`
             echo ::set-output name=branch::${GIT_BRANCH}
 
       - name: Detect Zabbix version