diff -up mozilla-esr38/configure.in.nss-3.19.0 mozilla-esr38/configure.in
--- mozilla-esr38/configure.in.nss-3.19.0	2015-06-25 10:36:40.205019840 +0200
+++ mozilla-esr38/configure.in	2015-06-25 11:58:46.859155245 +0200
@@ -3627,7 +3627,7 @@ MOZ_ARG_WITH_BOOL(system-nss,
     _USE_SYSTEM_NSS=1 )
 
 if test -n "$_USE_SYSTEM_NSS"; then
-    AM_PATH_NSS(3.19.2, [MOZ_NATIVE_NSS=1], [AC_MSG_ERROR([you don't have NSS installed or your version is too old])])
+    AM_PATH_NSS(3.19.1, [MOZ_NATIVE_NSS=1], [AC_MSG_ERROR([you don't have NSS installed or your version is too old])])
 fi
 
 if test -n "$MOZ_NATIVE_NSS"; then