diff --git a/uvloop/loop.pyx b/uvloop/loop.pyx
index 9ebf3a63..f14e3a36 100644
--- a/uvloop/loop.pyx
+++ b/uvloop/loop.pyx
@@ -975,7 +975,7 @@ cdef class Loop:
 
         if UVLOOP_DEBUG:
             if fut.cancelled():
-                # Shouldn't happen with _SyncSocketReaderFuture.
+                # Shouldn't happen with _SyncSocketWriterFuture.
                 raise RuntimeError(
                     f'_sock_sendall is called on a cancelled Future')
 
@@ -1059,7 +1059,8 @@ cdef class Loop:
         return fut
 
     cdef _sock_connect_cb(self, fut, sock, address):
-        if fut.cancelled():
+        if fut.done():
+            # Refs #378: this may be called multiple times.
             return
 
         try: