diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e4ab68e..3975f8d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -117,7 +117,7 @@ jobs:
       - name: basic test
         run: make ${{ matrix.arch_name.image }}.test
       - name: stockfish build test
-        if: ${{ matrix.arch_name.stockfish }} == "yes"
+        if: ${{ matrix.arch_name.stockfish == "yes" }}
         run: |
             git clone https://github.com/official-stockfish/Stockfish.git
             cd Stockfish