diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index debdaf44..4612d25c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -27,7 +27,7 @@ jobs:
           rm -f ~/.cargo/bin/cargo-fmt
           rustup toolchain install nightly --component rustfmt --component clippy --allow-downgrade
 
-      - name: install clang-format-17
+      - name: install clang-format-18
         run: |
           wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
           sudo add-apt-repository 'deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-18 main'
@@ -36,5 +36,8 @@ jobs:
 
       - name: Run format-check
         run: |
+          make format CLANG_FORMAT=clang-format-18
+          git diff
+          git reset --hard
           make format-check CLANG_FORMAT=clang-format-18
           make rustfmt-check
diff --git a/Makefile b/Makefile
index 8d1d56e0..2620e720 100644
--- a/Makefile
+++ b/Makefile
@@ -176,7 +176,7 @@ clean:
 format:
 	$(CLANG_FORMAT) -i src/*.c src/dcp/*.c src/math/*.c src/*.h src/dcp/*.h src/math/*.h sysinc/*.h
 format-check:
-	$(CLANG_FORMAT) --dry-run --Werror src/*.c src/*.h src/dcp/*.c src/dcp/*.h sysinc/*.h
+	$(CLANG_FORMAT) --dry-run --Werror src/*.c src/dcp/*.c src/math/*.c src/*.h src/dcp/*.h src/math/*.h sysinc/*.h
 rustfmt:
 	cd rust && cargo fmt
 rustfmt-check: