diff --git a/source/Irrlicht/CMakeLists.txt b/source/Irrlicht/CMakeLists.txt
index b78410c9..4b3fa21b 100644
--- a/source/Irrlicht/CMakeLists.txt
+++ b/source/Irrlicht/CMakeLists.txt
@@ -86,8 +86,7 @@ if(WIN32)
 elseif(IOS)
 	add_definitions(-D_IRR_IOS_PLATFORM_ -D_IRR_COMPILE_WITH_IOS_BUILTIN_MAIN_)
 	if(USE_SDL2)
-		message(WARNING "SDL2 backend is not supported on iOS")
-		set(USE_SDL2 FALSE)
+		message(SEND_ERROR "SDL2 backend is not supported on iOS")
 	endif()
 	set(DEVICE "IOS")
 elseif(OSX)
@@ -96,8 +95,7 @@ elseif(OSX)
 elseif(ANDROID)
 	add_definitions(-D_IRR_ANDROID_PLATFORM_ -D_IRR_COMPILE_ANDROID_ASSET_READER_)
 	if(USE_SDL2)
-		message(WARNING "SDL2 backend is not supported on Android")
-		set(USE_SDL2 FALSE)
+		message(SEND_ERROR "SDL2 backend is not supported on Android")
 	endif()
 	set(DEVICE "Android")
 elseif(EMSCRIPTEN)