diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 74a1e06219..e8bdc1052f 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2013-11-22  Tom Tromey  <tromey@redhat.com>
+
+	* gdb.dwarf2/dw2-bad-cfi.S: Update comment.
+
 2013-11-22  Tom Tromey  <tromey@redhat.com>
 
 	* gdb.dwarf2/dw2-bad-cfi.c: New file.
diff --git a/gdb/testsuite/gdb.dwarf2/dw2-bad-cfi.S b/gdb/testsuite/gdb.dwarf2/dw2-bad-cfi.S
index 9a97889a66..ab3a96729c 100644
--- a/gdb/testsuite/gdb.dwarf2/dw2-bad-cfi.S
+++ b/gdb/testsuite/gdb.dwarf2/dw2-bad-cfi.S
@@ -26,7 +26,8 @@ callee:
 	.loc 1 21 0
 	popq	%rbp
 /*	.cfi_def_cfa 7, 8 */
-	# Our little lies.
+	/* The bug we introduce is that the return address column is
+	   unspecified.  In this case, there is no way to unwind.  */
 	.cfi_undefined 6
 	.cfi_return_column 6
 # SUCC: EXIT [100.0%]