diff --git a/src/SDK_Intercept.c b/src/SDK_Intercept.c
index 8ea2b35..7cbc630 100644
--- a/src/SDK_Intercept.c
+++ b/src/SDK_Intercept.c
@@ -25,7 +25,7 @@
  * LLC. Start here: http://www.zerotier.com/
  */
 
-#if defined(ZT_SDK_INTERCEPT)
+#if defined(SDK_INTERCEPT)
 
 #include <unistd.h>
 #include <stdio.h>