diff --git a/audio/drivers/gx_audio.c b/audio/drivers/gx_audio.c
index aae3cdf1b4..cf51de77fe 100644
--- a/audio/drivers/gx_audio.c
+++ b/audio/drivers/gx_audio.c
@@ -16,6 +16,7 @@
 
 #include <stdlib.h>
 #include <string.h>
+#include <malloc.h>
 
 #ifdef GEKKO
 #include <gccore.h>