(string_to_join_field): Declare function to be `static'.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/join.c b/src/join.c
index 2716ae339..5fa140545 100644
--- a/src/join.c
+++ b/src/join.c
@@ -635,7 +635,7 @@ add_field (int file, size_t field)
    (the zero-based field number).  If it cannot be converted, give a
    diagnostic and exit.  */
 
-size_t
+static size_t
 string_to_join_field (char const *str, char const *err_msg_fmt)
 {
   size_t result;