diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6ac88ebd5..ff54abfc2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -215,7 +215,7 @@ endif()
 # Set some compiler options
 if(UNIX OR MINGW)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++0x")
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wno-unused-function")
 endif()
 
 if(MINGW AND CMAKE_BUILD_TYPE MATCHES Release)