diff -ur nss.org/nss/coreconf/WIN32.mk nss/nss/coreconf/WIN32.mk
--- a/nss.org/nss/coreconf/WIN32.mk	2016-04-13 11:33:09.322294523 +0200
+++ b/nss/nss/coreconf/WIN32.mk	2016-04-13 11:33:27.744323969 +0200
@@ -127,7 +127,7 @@
                       -D_CRT_NONSTDC_NO_WARNINGS
     OS_DLLFLAGS += -nologo -DLL -SUBSYSTEM:WINDOWS
     ifndef NSS_ENABLE_WERROR
-        NSS_ENABLE_WERROR = 1
+        NSS_ENABLE_WERROR = 0
     endif
     ifeq ($(NSS_ENABLE_WERROR),1)
         WARNING_CFLAGS += -WX