1 files changed, 7 insertions, 2 deletions

diff --git a/apps/codecs/codec.h b/apps/codecs/codec.h
index 0da653cf04..f954d1bc4d 100644
--- a/apps/codecs/codec.h
+++ b/apps/codecs/codec.h
@@ -29,16 +29,21 @@
  * be implemented elsewhere */
 #define malloc(x) codec_malloc(x)
 #define calloc(x,y) codec_calloc(x,y)
-#define alloca(x) codec_alloca(x)
 #define realloc(x,y) codec_realloc(x,y)
 #define free(x) codec_free(x)
 
 void* codec_malloc(size_t size);
 void* codec_calloc(size_t nmemb, size_t size);
-void* codec_alloca(size_t size);
 void* codec_realloc(void* ptr, size_t size);
 void codec_free(void* ptr);
 
+#if !defined(SIMULATOR)
+#define alloca __builtin_alloca
+#else
+#define alloca(x) codec_alloca(x)
+void* codec_alloca(size_t size);
+#endif
+
 #define abs(x) ((x)>0?(x):-(x))
 #define labs(x) abs(x)