diff --git a/ChangeLog b/ChangeLog
index 4cb65763cf..c496b2ec00 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Jul 14 16:07:25 2014  Eric Wong  <e@80x24.org>
+
+	* iseq.h (struct iseq_catch_table_entry): shrink to 32 bytes
+
 Mon Jul 14 16:04:41 2014  Eric Wong  <e@80x24.org>
 
 	* iseq.h (struct iseq_catch_table): new flexible array struct
diff --git a/iseq.h b/iseq.h
index be7d8efd9d..4d95a7a135 100644
--- a/iseq.h
+++ b/iseq.h
@@ -62,10 +62,10 @@ struct iseq_catch_table_entry {
 	CATCH_TYPE_NEXT   = INT2FIX(6)
     } type;
     VALUE iseq;
-    unsigned long start;
-    unsigned long end;
-    unsigned long cont;
-    unsigned long sp;
+    unsigned int start;
+    unsigned int end;
+    unsigned int cont;
+    unsigned int sp;
 };
 
 PACKED_STRUCT_UNALIGNED(struct iseq_catch_table {