diff --git a/src/ChangeLog b/src/ChangeLog
index a4c28b783b5..b11aa27eeaf 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2011-04-03  Jan Djärv  <jan.h.d@swipnet.se>
+
+	* nsterm.m (ns_update_auto_hide_menu_bar): Define MAC_OS_X_VERSION_10_6
+	if not defined (Bug#8403).
+
 2011-04-02  Juanma Barranquero  <lekktu@gmail.com>
 
 	* xdisp.c (display_count_lines): Remove parameter `start',
diff --git a/src/nsterm.m b/src/nsterm.m
index f783bbe025f..c4756dc83cd 100644
--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -583,6 +583,9 @@ ns_menu_bar_should_be_hidden (void)
 static void
 ns_update_auto_hide_menu_bar (void)
 {
+#ifndef MAC_OS_X_VERSION_10_6
+#define MAC_OS_X_VERSION_10_6 1060
+#endif
 #ifdef NS_IMPL_COCOA
 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6
   BLOCK_INPUT;