diff --git a/.github/workflows/build_all_targets.yml b/.github/workflows/build_all_targets.yml
index 6beb2329dd..590c50036f 100644
--- a/.github/workflows/build_all_targets.yml
+++ b/.github/workflows/build_all_targets.yml
@@ -61,7 +61,7 @@ jobs:
       - name: build target group
         run: |
             matrix_targets=${{matrix.targets}}
-            for target in ${matrix_targets//,/}
+            for target in ${matrix_targets//,/ }
             do
                 make $target
             done