diff --git a/maildrop/libs/maildrop/main.C b/maildrop/libs/maildrop/main.C
index c416527..10336dd 100644
--- a/maildrop/libs/maildrop/main.C
+++ b/maildrop/libs/maildrop/main.C
@@ -42,7 +42,7 @@
 #endif
 
 #if AUTHLIB
-#include	<courierauth.h>
+#include	<courier-authlib/courierauth.h>
 #endif
 
 #if	HAS_GETHOSTNAME