1 files changed, 2 insertions, 2 deletions
diff --git a/src/sub.cpp b/src/sub.cpp
index 66aa8fd..abd9deb 100644
--- a/src/sub.cpp
+++ b/src/sub.cpp
@@ -124,13 +124,13 @@ int zmq::sub_t::xsetsockopt (int option_, const void *optval_,
 
 int zmq::sub_t::xsend (struct zmq_msg_t *msg_, int flags_)
 {
-    errno = EFAULT;
+    errno = ENOTSUP;
     return -1;
 }
 
 int zmq::sub_t::xflush ()
 {
-    errno = EFAULT;
+    errno = ENOTSUP;
     return -1;
 }