diff --git a/.github/workflows/compile-arduino.yml b/.github/workflows/compile-arduino.yml
index 3e9b751..5adcea8 100644
--- a/.github/workflows/compile-arduino.yml
+++ b/.github/workflows/compile-arduino.yml
@@ -80,7 +80,8 @@ jobs:
           enable-deltas-report: "true"
           sketches-report-path: sketches-reports
           cli-compile-flags: |
-            - --build-property "compiler.cpp.extra_flag=-Wno-error=unused-function"
+            - --build-property
+            - compiler.cpp.extra_flag="-Wno-error=unused-function"
       - name: Report Arduino Sketch Size Deltas
         uses: arduino/report-size-deltas@v1.0.0
         with: