diff --git a/src/ccl.h b/src/ccl.h
index 5c1f90eeec8bfa0d79e02d8e26876135a7512abe..41e7e7dcb63ef916ed43ef61c1a8add842549faf 100644
--- a/src/ccl.h
+++ b/src/ccl.h
@@ -76,6 +76,9 @@ struct ccl_program {
 				   CCL_WRITE_CHAR.  After execution,
 				   if no such byte is written, set
 				   this value to zero.  */
+  int quit_silently;		/* If nonzero, don't append "CCL:
+				   Quitted" to the generated text when
+				   CCL program is quitted. */
 };
 
 /* This data type is used for the spec field of the structure