diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index c3f755eb77..20fd5735b3 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2012-04-11  Tristan Gingold  <gingold@adacore.com>
+
+	* i386-darwin-nat.c (i386_darwin_fetch_inferior_registers): Fix
+	warning.
+
 2012-04-11  Siva Chandra Reddy  <sivachandra@google.com>
 
 	New command 'explore' which helps explore values and types in
diff --git a/gdb/i386-darwin-nat.c b/gdb/i386-darwin-nat.c
index 1a757e4872..6afbbd0bec 100644
--- a/gdb/i386-darwin-nat.c
+++ b/gdb/i386-darwin-nat.c
@@ -71,7 +71,7 @@ i386_darwin_fetch_inferior_registers (struct target_ops *ops,
 	    {
 	      printf_unfiltered (_("Error calling thread_get_state for "
 				   "GP registers for thread 0x%lx\n"),
-				 current_thread);
+				 (unsigned long) current_thread);
 	      MACH_CHECK_ERROR (ret);
 	    }
 	  amd64_supply_native_gregset (regcache, &gp_regs.uts, -1);
@@ -91,7 +91,7 @@ i386_darwin_fetch_inferior_registers (struct target_ops *ops,
 	    {
 	      printf_unfiltered (_("Error calling thread_get_state for "
 				   "float registers for thread 0x%lx\n"),
-				 current_thread);
+				 (unsigned long) current_thread);
 	      MACH_CHECK_ERROR (ret);
 	    }
           amd64_supply_fxsave (regcache, -1, &fp_regs.ufs.fs64.__fpu_fcw);