diff --git a/mongoose.c b/mongoose.c
index 8d80c2c5..6dea122c 100644
--- a/mongoose.c
+++ b/mongoose.c
@@ -1973,7 +1973,7 @@ char *mg_ntoa(const struct mg_addr *addr, char *buf, size_t len) {
 }
 
 static bool mg_atonl(struct mg_str str, struct mg_addr *addr) {
-  if (mg_casecmp(str.ptr, "localhost") != 0) return false;
+  if (mg_vcasecmp(&str, "localhost") != 0) return false;
   addr->ip = mg_htonl(0x7f000001);
   addr->is_ip6 = false;
   return true;
diff --git a/mongoose.h b/mongoose.h
index dc8ba91e..1ec901d6 100644
--- a/mongoose.h
+++ b/mongoose.h
@@ -582,6 +582,7 @@ enum {
 
 
 
+
 struct mg_dns {
   const char *url;          // DNS server URL
   struct mg_connection *c;  // DNS server connection
diff --git a/src/net.c b/src/net.c
index b9610fb4..a2b40cfc 100644
--- a/src/net.c
+++ b/src/net.c
@@ -43,7 +43,7 @@ char *mg_ntoa(const struct mg_addr *addr, char *buf, size_t len) {
 }
 
 static bool mg_atonl(struct mg_str str, struct mg_addr *addr) {
-  if (mg_casecmp(str.ptr, "localhost") != 0) return false;
+  if (mg_vcasecmp(&str, "localhost") != 0) return false;
   addr->ip = mg_htonl(0x7f000001);
   addr->is_ip6 = false;
   return true;
diff --git a/src/net.h b/src/net.h
index 7738240f..24e1c6b9 100644
--- a/src/net.h
+++ b/src/net.h
@@ -3,6 +3,7 @@
 #include "arch.h"
 #include "event.h"
 #include "iobuf.h"
+#include "str.h"
 
 struct mg_dns {
   const char *url;          // DNS server URL
diff --git a/test/unit_test.c b/test/unit_test.c
index d3c2ecd8..5b3744cf 100644
--- a/test/unit_test.c
+++ b/test/unit_test.c
@@ -374,8 +374,8 @@ static void test_ws(void) {
   int i, done = 0;
 
   mg_mgr_init(&mgr);
-  mg_http_listen(&mgr, "http://127.0.0.1:12345", eh1, NULL);
-  mg_ws_connect(&mgr, "ws://127.0.0.1:12345/ws", wcb, &done, "%s", "");
+  ASSERT(mg_http_listen(&mgr, "ws://LOCALHOST:12345", eh1, NULL) != NULL);
+  mg_ws_connect(&mgr, "ws://localhost:12345/ws", wcb, &done, "%s", "");
   for (i = 0; i < 20; i++) mg_mgr_poll(&mgr, 1);
   ASSERT(done == 2);