diff --git a/extra/unix/ffi/ffi.factor b/extra/unix/ffi/ffi.factor
index e39d95dfa3..3751b4441c 100644
--- a/extra/unix/ffi/ffi.factor
+++ b/extra/unix/ffi/ffi.factor
@@ -3,13 +3,13 @@ USING: alien.syntax ;
 
 IN: unix.ffi
 
-FUNCTION: int open ( char* path, int flags, int prot ) ;
+! FUNCTION: int open ( char* path, int flags, int prot ) ;
 
-C-STRUCT: utimbuf
-    { "time_t" "actime"  }
-    { "time_t" "modtime" } ;
+! C-STRUCT: utimbuf
+!     { "time_t" "actime"  }
+!     { "time_t" "modtime" } ;
 
-FUNCTION: int utime ( char* path, utimebuf* buf ) ;
+! FUNCTION: int utime ( char* path, utimebuf* buf ) ;
 
-FUNCTION: int err_no ( ) ;
-FUNCTION: char* strerror ( int errno ) ;
\ No newline at end of file
+! FUNCTION: int err_no ( ) ;
+! FUNCTION: char* strerror ( int errno ) ;
\ No newline at end of file