diff --git a/examples/intrinsics/knc.h b/examples/intrinsics/knc.h
index 732330b9..c89095a0 100644
--- a/examples/intrinsics/knc.h
+++ b/examples/intrinsics/knc.h
@@ -85,7 +85,7 @@ typedef int64_t __vec1_i64;
 
 struct __vec16_i32;
 
-#if 0
+#if 1
 /* (iw) actually, this *SHOULD* be the right implementation for a
 vec16_i1: this one is a class that can have a constructor (which
 ISPC sometimes emits for these vectors...) This version might