diff --git a/main.c b/main.c
index 58619ba..8a59d76 100644
--- a/main.c
+++ b/main.c
@@ -40,7 +40,7 @@ MUTEX(logMutex);
 
 int rfbEnableLogging=1;
 
-#ifdef WORDS_BIGENDIAN
+#ifdef LIBVNCSERVER_WORDS_BIGENDIAN
 char rfbEndianTest = 0;
 #else
 char rfbEndianTest = -1;