diff --git a/src/Core.h b/src/Core.h
index e94a39e..96527d0 100644
--- a/src/Core.h
+++ b/src/Core.h
@@ -170,7 +170,7 @@ Thus it is **NOT SAFE** to allocate a string on the stack. */
 #define CC_BUILD_LINUX
 #define CC_BUILD_POSIX
 #define CC_BUILD_GL
-#define CC_BUILD_X11
+#define CC_BUILD_SDL
 #define CC_BUILD_CURL
 #define CC_BUILD_OPENAL
 #if defined CC_BUILD_RPI