diff --git a/.github/workflows/pr-test-sgl-kernel.yml b/.github/workflows/pr-test-sgl-kernel.yml
index df059c1f4..8c8d5ce97 100644
--- a/.github/workflows/pr-test-sgl-kernel.yml
+++ b/.github/workflows/pr-test-sgl-kernel.yml
@@ -27,7 +27,7 @@ jobs:
         with:
           source: sgl-kernel
           extensions: h,c,cpp,hpp,cu,cuh,cc
-          clangFormatVersion: 16
+          clangFormatVersion: 18
           style: file
 
   build-wheels:
diff --git a/sgl-kernel/src/sgl-kernel/include/utils.h b/sgl-kernel/src/sgl-kernel/include/utils.h
index b2960954b..79bf84671 100644
--- a/sgl-kernel/src/sgl-kernel/include/utils.h
+++ b/sgl-kernel/src/sgl-kernel/include/utils.h
@@ -94,7 +94,7 @@ inline int getSMVersion() {
 #define DISPATCH_INTEGRAL_TYPES(TYPE, NAME, ...) \
   AT_DISPATCH_SWITCH(TYPE, NAME, DISPATCH_CASE_INTEGRAL_TYPES(__VA_ARGS__))
 
-#define CEILDIV(x, y) (((x) + (y)-1) / (y))
+#define CEILDIV(x, y) (((x) + (y) - 1) / (y))
 #define WARP_SIZE 32
 
 #ifndef USE_ROCM