diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 83bcb2d2bf..45528fce3d 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -152,6 +152,7 @@ jobs:
         # We build and run the Lagom tests in a separate job, and sanitizer builds take a good while longer than non-sanitized.
         run:  |
           cmake -S Meta/CMake/Superbuild -B Build/superbuild -GNinja \
+            -DENABLE_COMPILETIME_HEADER_CHECK=ON \
             -DSERENITY_ARCH=${{ matrix.arch }} \
             -DSERENITY_TOOLCHAIN=GNU \
             -DCMAKE_C_COMPILER=gcc-10 \