diff --git a/netwerk/cookie/src/Makefile.in b/netwerk/cookie/src/Makefile.in
index 1974ab144390..e15191e624e2 100644
--- a/netwerk/cookie/src/Makefile.in
+++ b/netwerk/cookie/src/Makefile.in
@@ -60,5 +60,4 @@ CPPSRCS		= \
 
 include $(topsrcdir)/config/rules.mk
 
-CXXFLAGS += $(WARNINGS_AS_ERRORS)
 DEFINES += -DIMPL_NS_NET