1 files changed, 1 insertions, 1 deletions
diff --git a/bignum.c b/bignum.c
index c780e7d7a3..cdb84c600d 100644
--- a/bignum.c
+++ b/bignum.c
@@ -4838,7 +4838,7 @@ rb_big2str_generic(VALUE x, int base)
 }
 
 #ifdef USE_GMP
-VALUE
+static VALUE
 big2str_gmp(VALUE x, int base)
 {
     const size_t nails = (sizeof(BDIGIT)-SIZEOF_BDIGIT)*CHAR_BIT;