diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1ef6935..8bb3f3f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,9 +10,13 @@ set(CMAKE_C_STANDARD_REQUIRED TRUE)
 set(CMAKE_C_EXTENSIONS FALSE)
 
 if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
+        # Clang or AppleClang
+        set(CMAKE_CXX_FLAGS "-Wall ${CMAKE_CXX_FLAGS}")
+endif()
+
+if ("${CMAKE_C_COMPILER_ID}" MATCHES "Clang")
 	# Clang or AppleClang
-	set(CMAKE_CXX_FLAGS "-Wall")
-	set(CMAKE_C_FLAGS "-Wall")
+	set(CMAKE_C_FLAGS "-Wall ${CMAKE_C_FLAGS}")
 endif()