diff --git a/src/doomdef.h b/src/doomdef.h
index be4557b1..e9dddf5d 100644
--- a/src/doomdef.h
+++ b/src/doomdef.h
@@ -673,7 +673,7 @@ extern const char *compdate, *comptime, *comprevision, *compbranch;
 /// Hardware renderer: OpenGL
 #define GL_SHADERS
 
-#ifdef HAVE_CURL
+#if defined (HAVE_CURL) && ! defined (NONET)
 #define MASTERSERVER
 #else
 #undef UPDATE_ALERT