1 files changed, 1 insertions, 1 deletions
diff --git a/math.c b/math.c
index 9bc7e2a402..2675c71e6d 100644
--- a/math.c
+++ b/math.c
@@ -313,7 +313,7 @@ static VALUE
 math_log(int argc, VALUE *argv)
 {
     VALUE x, base;
-    double d, b;
+    double d;
 
     rb_scan_args(argc, argv, "11", &x, &base);
     Need_Float(x);