diff --git a/sys/conf/kern.mk b/sys/conf/kern.mk
index fddd8669d96..0410b244b85 100644
--- a/sys/conf/kern.mk
+++ b/sys/conf/kern.mk
@@ -23,7 +23,8 @@ NO_WSHIFT_COUNT_OVERFLOW=	-Wno-shift-count-overflow
 # Several other warnings which might be useful in some cases, but not severe
 # enough to error out the whole kernel build.  Display them anyway, so there is
 # some incentive to fix them eventually.
-CWARNEXTRA?=	-Wno-error-tautological-compare -Wno-error-empty-body
+CWARNEXTRA?=	-Wno-error-tautological-compare -Wno-error-empty-body \
+		-Wno-error-parentheses-equality
 .endif
 
 #