diff --git a/usr.sbin/hyperv/Makefile.inc b/usr.sbin/hyperv/Makefile.inc
index 265f86d1ed55..edb012926dd1 100644
--- a/usr.sbin/hyperv/Makefile.inc
+++ b/usr.sbin/hyperv/Makefile.inc
@@ -1,3 +1,4 @@
 # $FreeBSD$
 
+CFLAGS.gcc+= -Wno-uninitialized
 .include "../Makefile.inc"