diff --git a/src/fileio.c b/src/fileio.c
index 814c1cd73fb..d693369ddfe 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -5929,4 +5929,4 @@ a non-nil value.");
   defsubr (&Sunix_sync);
 #endif
 }
-(_GNU_SOURCE): 
+