diff --git a/example/01_gemm/CMakeLists.txt b/example/01_gemm/CMakeLists.txt
index dc445fb935..c403e51ed9 100644
--- a/example/01_gemm/CMakeLists.txt
+++ b/example/01_gemm/CMakeLists.txt
@@ -8,7 +8,7 @@ add_dependencies(example_gemm_dl example_gemm_dl_fp32)
 add_dependencies(example_gemm_dl example_gemm_dl_fp16)
 add_dependencies(example_gemm_dl example_gemm_dl_int8)
 
-if (USE_BITINT_EXTENSION_INT4)
+if(USE_BITINT_EXTENSION_INT4)
   add_example_executable(example_gemm_dl_int4 gemm_dl_int4.cpp)
   add_dependencies(example_gemm_dl example_gemm_dl_int4)
 endif(USE_BITINT_EXTENSION_INT4)
@@ -24,7 +24,7 @@ add_dependencies(example_gemm_xdl example_gemm_xdl_fp16)
 add_dependencies(example_gemm_xdl example_gemm_xdl_bf16)
 add_dependencies(example_gemm_xdl example_gemm_xdl_int8)
 
-if (USE_BITINT_EXTENSION_INT4)
+if(USE_BITINT_EXTENSION_INT4)
   add_example_executable(example_gemm_xdl_int4 gemm_xdl_int4.cpp)
   add_dependencies(example_gemm_xdl example_gemm_xdl_int4)
 endif(USE_BITINT_EXTENSION_INT4)