diff --git a/tests/fuzz/wasm-mutator-fuzz/CMakeLists.txt b/tests/fuzz/wasm-mutator-fuzz/CMakeLists.txt
index 6bb7fc75..020d3e7f 100644
--- a/tests/fuzz/wasm-mutator-fuzz/CMakeLists.txt
+++ b/tests/fuzz/wasm-mutator-fuzz/CMakeLists.txt
@@ -7,8 +7,12 @@ project(wasm_mutator)
 
 set (CMAKE_BUILD_TYPE Debug)
 
+if (NOT DEFINED CMAKE_C_COMPILER)
 set (CMAKE_C_COMPILER "clang")
+endif ()
+if (NOT DEFINED CMAKE_CXX_COMPILER)
 set (CMAKE_CXX_COMPILER "clang++")
+endif ()
 
 string (TOLOWER ${CMAKE_HOST_SYSTEM_NAME} WAMR_BUILD_PLATFORM)