diff -NuarwPbB libnss-mysql.orig/configure.in libnss-mysql/configure.in
--- libnss-mysql.orig/configure.in	2005-09-04 03:34:00.000000000 +0000
+++ libnss-mysql/configure.in	2010-09-08 18:12:24.577317098 +0000
@@ -38,7 +38,9 @@
 AC_ARG_WITH(mysql,
             [  --with-mysql=DIR        Location of your MySQL installation])
 AC_ARG_ENABLE(debug,
-            [  --enable-debug          Enable debug (see DEBUGGING)],
+            [  --enable-debug          Enable debug (see DEBUGGING)])
+
+AS_IF([test "x$enable_debug" = "xyes"],
             [AC_DEFINE([DEBUG], 1, [Enable debug])])
 
 case "$target_os" in