diff --git a/tlsf.c b/tlsf.c
index f4fc7863b3..eb1cb9cf91 100644
--- a/tlsf.c
+++ b/tlsf.c
@@ -898,7 +898,7 @@ int tlsf_check(tlsf_t tlsf)
 static void default_walker(void* ptr, size_t size, int used, void* user)
 {
 	(void)user;
-	printf("\t%p %s size: %x (%p)\n", ptr, used ? "used" : "free", (unsigned int)size, block_from_ptr(ptr));
+	printf("\t%p %s size: %x (%p)\n", ptr, used ? "used" : "free", (unsigned int)size, (void *)block_from_ptr(ptr));
 }
 
 void tlsf_walk_pool(pool_t pool, tlsf_walker walker, void* user)