1 files changed, 1 insertions, 1 deletions
diff --git a/bignum.c b/bignum.c
index 027384076d..f247d8f1a5 100644
--- a/bignum.c
+++ b/bignum.c
@@ -1599,7 +1599,7 @@ rb_big_pow(x, y)
 	break;
 
       case T_FIXNUM:
-	yy = NUM2LONG(y);
+	yy = FIX2LONG(y);
 	if (yy > 0) {
 	    VALUE z = x;