diff --git a/c/unix/socket.c b/c/unix/socket.c
index 7acca9e..6ea2271 100644
--- a/c/unix/socket.c
+++ b/c/unix/socket.c
@@ -43,7 +43,7 @@ s48_value s48_add_pending_channel (s48_value channel)
   S48_CHECK_CHANNEL(channel);
   socket_fd = S48_UNSAFE_EXTRACT_FIXNUM(S48_UNSAFE_CHANNEL_OS_INDEX(channel));
 
-  if (! s48_add_pending_fd(socket_fd, 1)) // 1 for: yes, is input 
+  if (! s48_add_pending_fd(socket_fd, 1)) /* 1 for: yes, is input */
     s48_raise_out_of_memory_error();
 
   return S48_UNSPECIFIC;