diff --git a/CMakeLists.txt b/CMakeLists.txt
index a0e9c1f46..280fec212 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,7 @@ set(CMAKE_AUTOMOC OFF)
 
 if(${CMAKE_CXX_COMPILER_ID} STREQUAL "MSVC")
 else()
-	set(CMAKE_CXX_FLAGS "-std=c++11 -Wall -Wextra -Wconversion -Wno-sign-conversion -Wno-unknown-pragmas")
+	set(CMAKE_CXX_FLAGS "-std=c++11 -Wall -Wextra -Wconversion -Wno-sign-conversion -Wno-unknown-pragmas ${CMAKE_CXX_FLAGS}")
 endif()
 
 if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux")