diff --git a/numeric.c b/numeric.c
index ab6e6d9ebf..2d338e1b26 100644
--- a/numeric.c
+++ b/numeric.c
@@ -170,13 +170,9 @@ round_half_even(double x, double s)
     return x;
 }
 
-static VALUE fix_uminus(VALUE num);
-static VALUE fix_mul(VALUE x, VALUE y);
 static VALUE fix_lshift(long, unsigned long);
 static VALUE fix_rshift(long, unsigned long);
 static VALUE int_pow(long x, unsigned long y);
-static VALUE int_even_p(VALUE x);
-static int int_round_zero_p(VALUE num, int ndigits);
 static VALUE rb_int_floor(VALUE num, int ndigits);
 static VALUE rb_int_ceil(VALUE num, int ndigits);
 static VALUE flo_to_i(VALUE num);