Index: head/usr.sbin/hyperv/Makefile.inc
===================================================================
--- head/usr.sbin/hyperv/Makefile.inc	(revision 286991)
+++ head/usr.sbin/hyperv/Makefile.inc	(revision 286992)
@@ -1,3 +1,4 @@
 # $FreeBSD$
 
+CFLAGS.gcc+= -Wno-uninitialized
 .include "../Makefile.inc"