diff --git a/plugins/LadspaEffect/calf/CMakeLists.txt b/plugins/LadspaEffect/calf/CMakeLists.txt
index db6dea7a5..d685f5302 100644
--- a/plugins/LadspaEffect/calf/CMakeLists.txt
+++ b/plugins/LadspaEffect/calf/CMakeLists.txt
@@ -7,9 +7,9 @@ INCLUDE_DIRECTORIES("${CMAKE_SOURCE_DIR}/include"
 INSTALL(TARGETS calf LIBRARY DESTINATION "${PLUGIN_DIR}/ladspa")
 SET_TARGET_PROPERTIES(calf PROPERTIES PREFIX "")
 SET(INLINE_FLAGS "")
-IF(NOT LMMS_BUILD_APPLE)
+IF("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
 SET(INLINE_FLAGS "-finline-functions-called-once -finline-limit=80")
-ENDIF(NOT LMMS_BUILD_APPLE)
+ENDIF()
 SET_TARGET_PROPERTIES(calf PROPERTIES COMPILE_FLAGS "-O2 -finline-functions ${INLINE_FLAGS}")
 
 IF(LMMS_BUILD_WIN32)