--- a/argp-fmtstream.h
+++ b/argp-fmtstream.h
@@ -192,7 +192,7 @@ extern void __argp_fmtstream_update (arg
 extern int _argp_fmtstream_ensure (argp_fmtstream_t __fs, size_t __amount);
 extern int __argp_fmtstream_ensure (argp_fmtstream_t __fs, size_t __amount);
 
-#ifdef __OPTIMIZE__
+#if 0
 /* Inline versions of above routines.  */
 
 #if !_LIBC
