Index: ptlib-2.10.10~dfsg/include/ptlib/critsec.h
===================================================================
--- ptlib-2.10.10~dfsg.orig/include/ptlib/critsec.h
+++ ptlib-2.10.10~dfsg/include/ptlib/critsec.h
@@ -40,7 +40,7 @@
 #if P_HAS_ATOMIC_INT
 
 #if defined(__GNUC__)
-#  if __GNUC__ >= 4 && __GNUC_MINOR__ >= 2
+#  if (__GNUC__ >= 4 && __GNUC_MINOR__ >= 2) || __GNUC__ >= 5
 #     include <ext/atomicity.h>
 #  else
 #     include <bits/atomicity.h>
