diff --git a/gdb/nat/x86-dregs.c b/gdb/nat/x86-dregs.c
index cf8e517eb0d..24751647005 100644
--- a/gdb/nat/x86-dregs.c
+++ b/gdb/nat/x86-dregs.c
@@ -52,7 +52,7 @@ x86_dr_low_set_addr (struct x86_debug_reg_state *new_state, int i)
 
 /* Return the inferior's debug register REGNUM.  */
 
-static unsigned long
+static CORE_ADDR
 x86_dr_low_get_addr (int i)
 {
   return x86_dr_low.get_addr (i);