diff --git a/cmake/EthCompilerSettings.cmake b/cmake/EthCompilerSettings.cmake
index 35a855a45..7cb42e0e4 100755
--- a/cmake/EthCompilerSettings.cmake
+++ b/cmake/EthCompilerSettings.cmake
@@ -3,7 +3,7 @@
 # C++11 check and activation
 if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
 
-	set(CMAKE_CXX_FLAGS "-std=c++11 -Wall -Wno-unknown-pragmas -Wextra -Werror -DSHAREDLIB -fPIC")
+	set(CMAKE_CXX_FLAGS "-std=c++11 -Wall -Wno-unknown-pragmas -Wextra -Werror -DSHAREDLIB -fPIC ${CMAKE_CXX_FLAGS}")
 	set(CMAKE_CXX_FLAGS_DEBUG          "-O0 -g -DETH_DEBUG")
 	set(CMAKE_CXX_FLAGS_MINSIZEREL     "-Os -DNDEBUG -DETH_RELEASE")
 	set(CMAKE_CXX_FLAGS_RELEASE        "-O3 -DNDEBUG -DETH_RELEASE")