diff --git a/glib/giochannel.c b/glib/giochannel.c
index 9e9c1cb66..d345773b1 100644
--- a/glib/giochannel.c
+++ b/glib/giochannel.c
@@ -824,9 +824,11 @@ g_io_channel_error_from_errno (gint en)
 #endif
 
 #ifdef EOVERFLOW
+#if EOVERFLOW != EFBIG
     case EOVERFLOW:
       return G_IO_CHANNEL_ERROR_OVERFLOW;
 #endif
+#endif
 
 #ifdef EPIPE
     case EPIPE: