Index: ecc-point-mul-g.c
--- ecc-point-mul-g.c.orig
+++ ecc-point-mul-g.c
@@ -36,6 +36,7 @@
 #endif
 
 #include <assert.h>
+#include <stdlib.h>  /* alloca */
 
 #include "ecc.h"
 #include "ecc-internal.h"