diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8f1ad0fb67..a8fc1f0ae7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -781,7 +781,7 @@ if(NOT DISABLE_WX AND NOT ANDROID)
 			message(FATAL_ERROR "wxWidgets in Externals is not compatible with your platform")
 		endif()
 
-		include_directories(
+		include_directories(SYSTEM
 			Externals/wxWidgets3
 			Externals/wxWidgets3/include)
 		add_subdirectory(Externals/wxWidgets3)