--- configure.ac	(Asterisk 13.20)
+++ configure.ac	(working copy)
@@ -2346,2 +2346,2 @@
-# Some distributions (like SuSE) remove the 5.1 suffix.
-AST_EXT_LIB_CHECK([LUA], [lua], [luaL_openlib], [lua.h], [-lm])
+# Some distributions (like openSUSE and NetBSD) remove the 5.x suffix.
+AST_EXT_LIB_CHECK([LUA], [lua], [luaL_newstate], [lua.h], [-lm])