diff --git a/Source/tess.c b/Source/tess.c
index a2f5e14..5f47f8d 100755
--- a/Source/tess.c
+++ b/Source/tess.c
@@ -632,6 +632,7 @@
 	tess->reverseContours = 0;
     
 	tess->windingRule = TESS_WINDING_ODD;
+	tess->processCDT = 0;
 
 	if (tess->alloc.regionBucketSize < 16)
 		tess->alloc.regionBucketSize = 16;