diff --git a/intern/cycles/CMakeLists.txt b/intern/cycles/CMakeLists.txt
index 8bb99e4e4f3..d014326fcd5 100644
--- a/intern/cycles/CMakeLists.txt
+++ b/intern/cycles/CMakeLists.txt
@@ -12,7 +12,7 @@ set(GCC_WARNING_FLAGS "-Wall -Wextra -Wno-unused-parameter -Wno-long-long")
 set(GCC_OPTIM_FLAGS "-ffast-math -msse -msse2 -msse3 -mtune=native")
 
 if(APPLE)
-	set(CMAKE_CXX_FLAGS "${GCC_WARNING_FLAGS} ${GCC_OPTIM_FLAGS}")
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GCC_WARNING_FLAGS} ${GCC_OPTIM_FLAGS}")
 	set(RTTI_DISABLE_FLAGS "-fno-rtti -DBOOST_NO_RTTI -DBOOST_NO_TYPEID")
 endif(APPLE)
 
@@ -21,13 +21,13 @@ if(WIN32)
 		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /Ox /Ot /arch:SSE2 -D_CRT_SECURE_NO_WARNINGS /EHsc /fp:fast")
 		set(RTTI_DISABLE_FLAGS "/GR- -DBOOST_NO_RTTI -DBOOST_NO_TYPEID")
 	elseif(CMAKE_COMPILER_IS_GNUCC)
-		set(CMAKE_CXX_FLAGS "${GCC_WARNING_FLAGS} ${GCC_OPTIM_FLAGS}")
+		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GCC_WARNING_FLAGS} ${GCC_OPTIM_FLAGS}")
 		set(RTTI_DISABLE_FLAGS "-fno-rtti -DBOOST_NO_RTTI -DBOOST_NO_TYPEID")
 	endif()
 endif(WIN32)
 
 if(UNIX AND NOT APPLE)
-	set(CMAKE_CXX_FLAGS "${GCC_WARNING_FLAGS} ${GCC_OPTIM_FLAGS}")
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GCC_WARNING_FLAGS} ${GCC_OPTIM_FLAGS}")
 	set(RTTI_DISABLE_FLAGS "-fno-rtti -DBOOST_NO_RTTI -DBOOST_NO_TYPEID")
 endif(UNIX AND NOT APPLE)