diff --git a/src/.gdbinit b/src/.gdbinit
index 8299b814564..317db96aa42 100644
--- a/src/.gdbinit
+++ b/src/.gdbinit
@@ -51,7 +51,7 @@ Print the specific type of $, assuming it is some misc type.
 end
 
 define xint
-print (($ & 0x00ffffff) << 4) >> 4
+print (($ & 0x0fffffff) << 4) >> 4
 end
 document xint
 Print $, assuming it is an Emacs Lisp integer.  This gets the sign right.