Index: head/sys/modules/nvdimm/Makefile
===================================================================
--- head/sys/modules/nvdimm/Makefile	(revision 353114)
+++ head/sys/modules/nvdimm/Makefile	(revision 353115)
@@ -1,16 +1,21 @@
 # $FreeBSD$
 
 .PATH: ${SRCTOP}/sys/dev/nvdimm
 
 KMOD=	nvdimm
 SRCS=	nvdimm.c \
 	nvdimm_acpi.c \
 	nvdimm_e820.c \
 	nvdimm_nfit.c \
 	nvdimm_ns.c \
 	nvdimm_spa.c
 
 SRCS+=	acpi_if.h bus_if.h device_if.h
 SRCS+=	opt_acpi.h opt_ddb.h
 
 .include <bsd.kmod.mk>
+
+# Mute spurious Clang warning.
+.if ${COMPILER_TYPE} == "clang"
+CWARNFLAGS.nvdimm_e820.c+=	-Wno-missing-braces
+.endif