diff --git a/ChangeLog b/ChangeLog
index bb348b3910..93829ca473 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Nov 22 14:55:00 2013  Kenta Murata  <mrkn@mrkn.jp>
+
+	* ext/bigdecimal/bigdecimal.c (BigMath_s_exp): Insert rb_thread_check_ints.
+
 Fri Nov 22 14:35:00 2013  Kenta Murata  <mrkn@mrkn.jp>
 
 	* ext/bigdecimal/bigdecimal.c (BigMath_s_exp): Fix the inserting points
diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c
index 99543229ef..af1d5246f5 100644
--- a/ext/bigdecimal/bigdecimal.c
+++ b/ext/bigdecimal/bigdecimal.c
@@ -2746,6 +2746,9 @@ BigMath_s_exp(VALUE klass, VALUE x, VALUE vprec)
 	SIGNED_VALUE const ey = VpExponent10(DATA_PTR(y));
 	SIGNED_VALUE const ed = VpExponent10(DATA_PTR(d));
 	ssize_t m = n - vabs(ey - ed);
+
+	rb_thread_check_ints();
+
 	if (m <= 0) {
 	    break;
 	}