diff --git a/ChangeLog b/ChangeLog
index 3c95bf8941..bc336dcc5e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sun Apr 28 08:02:00 2013  Zachary Scott  <zachary@zacharyscott.net>
+
+	* README.EXT: Add note to warn use of %i in Exceptions [Bug #7982]
+
 Sun Apr 28 02:41:05 2013  Tanaka Akira  <akr@fsij.org>
 
 	* configure.in: Fix a typo.  Should check endgrent() instead of
diff --git a/README.EXT b/README.EXT
index ba74e5c8d2..b8a486dde7 100644
--- a/README.EXT
+++ b/README.EXT
@@ -1366,6 +1366,8 @@ void rb_bug(const char *fmt, ...) ::
   called under the situation caused by the bug in the interpreter.  No
   exception handling nor ensure execution will be done.
 
+Note: You can't use %i or variations of int with the fmt string message.
+
 == Initialize and Start the Interpreter
 
 The embedding API functions are below (not needed for extension libraries):