diff --git a/raylib/external/stb_vorbis.c b/raylib/external/stb_vorbis.c
index 5f2e081..9528301 100644
--- a/raylib/external/stb_vorbis.c
+++ b/raylib/external/stb_vorbis.c
@@ -193,7 +193,9 @@
    #undef __forceinline
    #endif
    #define __forceinline
+   #ifndef alloca
    #define alloca __builtin_alloca
+   #endif
 #elif !defined(_MSC_VER)
    #if __GNUC__
       #define __forceinline inline