diff --git a/mhook-test/mhook-test.cpp b/mhook-test/mhook-test.cpp
index 06c0b2d..9873aae 100644
--- a/mhook-test/mhook-test.cpp
+++ b/mhook-test/mhook-test.cpp
@@ -188,7 +188,7 @@ int wmain(int argc, WCHAR* argv[])
         // in this context anyway.
         WSADATA wd = {0};
         WSAStartup(MAKEWORD(2, 2), &wd);
-        char* ip = "localhost";
+        const char* ip = "localhost";
         struct addrinfo aiHints;
         struct addrinfo *res = NULL;
         memset(&aiHints, 0, sizeof(aiHints));