diff --git a/src/wasm-sample/shape.c b/src/wasm-sample/shape.c
index 69efaca93..1b2f4f44f 100644
--- a/src/wasm-sample/shape.c
+++ b/src/wasm-sample/shape.c
@@ -2,8 +2,6 @@
 
 #include <hb-wasm-api.h>
 
-void free (void*);
-
 void debugprint1 (char *s, int32_t);
 void debugprint2 (char *s, int32_t, int32_t);