diff --git a/.github/workflows/cmake-multi-platform.yml b/.github/workflows/cmake-multi-platform.yml
index ad245af..a80bf69 100644
--- a/.github/workflows/cmake-multi-platform.yml
+++ b/.github/workflows/cmake-multi-platform.yml
@@ -52,7 +52,7 @@ jobs:
 
       - name: Build
         # Build your program with the given configuration. Note that --config is needed because the default Windows generator is a multi-config generator (Visual Studio generator).
-        run: cmake --build ${{ steps.strings.outputs.build-output-dir }} --config ${{ matrix.build_type }}
+        run: cmake -DDEFINE_DEBUG=1 --build ${{ steps.strings.outputs.build-output-dir }} --config ${{ matrix.build_type }}
 
       - name: Test
         working-directory: ${{ steps.strings.outputs.build-output-dir }}/Doctests