diff --git a/packages/swig/yap.c b/packages/swig/yap.c
index 61adeb639..bf77d1e05 100644
--- a/packages/swig/yap.c
+++ b/packages/swig/yap.c
@@ -2,7 +2,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#include "YAPInterface.h"
+#include "YapInterface.h"
 
 static void init_yap( void );
 int yap_prove_string(char *s);