diff --git a/Source/tess.c b/Source/tess.c
index 7525fd6..9312791 100755
--- a/Source/tess.c
+++ b/Source/tess.c
@@ -34,6 +34,7 @@
 #include <setjmp.h>
 #include "bucketalloc.h"
 #include "tess.h"
+#include "tesselator.h"
 #include "mesh.h"
 #include "sweep.h"
 #include "geom.h"