diff --git a/.github/workflows/build_mmvii.yml b/.github/workflows/build_mmvii.yml
index e41cf37ec..dfecc9e9e 100644
--- a/.github/workflows/build_mmvii.yml
+++ b/.github/workflows/build_mmvii.yml
@@ -25,7 +25,7 @@ jobs:
           lib/libelise.a
           lib/libANN.a
           bin/mm3d
-        key: ${{ runner.os }}-build-mm3d-${{ hashFiles('src/**/*.cpp,src/**/*.h,include/**/*.h') }}
+        key: ${{ runner.os }}-build-mm3d-${{ hashFiles('src/**/*.cpp','src/**/*.h','include/**/*.h') }}
 
     - if: ${{ steps.cache-mm3d.outputs.cache-hit != 'true' }}
       name: Configure CMake for mm3d