diff --git a/.github/workflows/manual-docker-publish.yml b/.github/workflows/manual-docker-publish.yml
index ce371bf3f9..fdca86ec7c 100644
--- a/.github/workflows/manual-docker-publish.yml
+++ b/.github/workflows/manual-docker-publish.yml
@@ -41,7 +41,7 @@ jobs:
 
   publish:
     needs: [get-image-list]
-    if: ${{ fromJSON(needs.get-image-list.outputs.matrix).length != 0 }}
+    if: ${{ needs.get-image-list.outputs.matrix != '' }}
     strategy:
       matrix:
         image: ${{ fromJSON(needs.get-image-list.outputs.matrix) }}