1 files changed, 2 insertions, 1 deletions

diff --git a/libbb/str_tolower.c b/libbb/str_tolower.c
index 037f717c7..f402e8e6f 100644
--- a/libbb/str_tolower.c
+++ b/libbb/str_tolower.c
@@ -4,7 +4,8 @@
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 #include "libbb.h"
-char* str_tolower(char *str)
+
+char* FAST_FUNC str_tolower(char *str)
 {
         char *c;
         for (c = str; *c; ++c)