1 files changed, 1 insertions, 0 deletions
diff --git a/ares.h b/ares.h
index 386c0ca..f64e862 100644
--- a/ares.h
+++ b/ares.h
@@ -86,6 +86,7 @@ extern "C" {
 #define ARES_ENOMEM             15
 #define ARES_EDESTRUCTION       16
 #define ARES_EBADSTR            17
+#define ARES_ECANCELLED         21
 
 /* ares_getnameinfo error codes */
 #define ARES_EBADFLAGS          18