diff --git a/math.c b/math.c
index d0a8af8700..2be2a6c51a 100644
--- a/math.c
+++ b/math.c
@@ -674,7 +674,8 @@ exp1(cosh)
 exp1(exp)
 exp2(hypot)
 
-VALUE rb_math_log(int argc, VALUE *argv)
+VALUE
+rb_math_log(int argc, VALUE *argv)
 {
     return math_log(argc, argv);
 }