diff --git a/ChangeLog b/ChangeLog
index 976f7f911c..4b7c380b21 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri Sep 18 07:39:22 2015  Aaron Patterson <tenderlove@ruby-lang.org>
+
+	* ext/objspace/objspace_dump.c (obj_type): add IMEMO types to the heap
+	  dump information.
+
 Thu Sep 17 22:33:07 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
 
 	* common.mk: fix command error with outside builddir.
diff --git a/ext/objspace/objspace_dump.c b/ext/objspace/objspace_dump.c
index b6973df10e..57d136b608 100644
--- a/ext/objspace/objspace_dump.c
+++ b/ext/objspace/objspace_dump.c
@@ -116,6 +116,7 @@ obj_type(VALUE obj)
 	CASE_TYPE(SYMBOL);
 	CASE_TYPE(RATIONAL);
 	CASE_TYPE(COMPLEX);
+	CASE_TYPE(IMEMO);
 	CASE_TYPE(UNDEF);
 	CASE_TYPE(NODE);
 	CASE_TYPE(ZOMBIE);