diff --git a/build/mod_lua.c b/build/mod_lua.c
index de72c439..93f05984 100644
--- a/build/mod_lua.c
+++ b/build/mod_lua.c
@@ -344,10 +344,9 @@ static void lsp_send_err(struct mg_connection *conn, struct lua_State *L,
                          const char *fmt, ...) {
   char buf[MG_BUF_LEN];
   va_list ap;
-  int len;
 
   va_start(ap, fmt);
-  len = vsnprintf(buf, sizeof(buf), fmt, ap);
+  vsnprintf(buf, sizeof(buf), fmt, ap);
   va_end(ap);
 
   if (L == NULL) {
diff --git a/mongoose.c b/mongoose.c
index cc7d4a48..af7a6803 100644
--- a/mongoose.c
+++ b/mongoose.c
@@ -4552,7 +4552,8 @@ static int is_valid_port(unsigned int port) {
 // Examples: 80, 443s, 127.0.0.1:3128, 1.2.3.4:8080s
 // TODO(lsm): add parsing of the IPv6 address
 static int parse_port_string(const struct vec *vec, struct socket *so) {
-  unsigned int a, b, c, d, ch, len, port;
+  unsigned int a, b, c, d, ch, port;
+  int len;
 #if defined(USE_IPV6)
   char buf[100];
 #endif