diff --git a/sys/modules/drm/r128/Makefile b/sys/modules/drm/r128/Makefile
index 215397a0d86..2cf90003e94 100644
--- a/sys/modules/drm/r128/Makefile
+++ b/sys/modules/drm/r128/Makefile
@@ -7,6 +7,6 @@ SRCS	+=device_if.h bus_if.h pci_if.h opt_drm.h
 
 .include <bsd.kmod.mk>
 
-CWARNFLAGS.r128_cce.c=		${NO_WUNUSED_VALUE} ${NO_WCONSTANT_CONVERSION}
-CWARNFLAGS.r128_state.c=	${NO_WUNUSED_VALUE}
+CWARNFLAGS.r128_cce.c=		-Wno-unused ${NO_WCONSTANT_CONVERSION}
+CWARNFLAGS.r128_state.c=	-Wno-unused
 CWARNFLAGS+=			${CWARNFLAGS.${.IMPSRC:T}}
diff --git a/sys/modules/drm/radeon/Makefile b/sys/modules/drm/radeon/Makefile
index d6413c4ea1e..88e7ccf826d 100644
--- a/sys/modules/drm/radeon/Makefile
+++ b/sys/modules/drm/radeon/Makefile
@@ -8,6 +8,6 @@ SRCS	+=device_if.h bus_if.h pci_if.h opt_drm.h
 
 .include <bsd.kmod.mk>
 
-CWARNFLAGS.r600_cp.c=	${NO_WUNUSED_VALUE} ${NO_WCONSTANT_CONVERSION}
-CWARNFLAGS.radeon_cp.c=	${NO_WUNUSED_VALUE} ${NO_WCONSTANT_CONVERSION}
+CWARNFLAGS.r600_cp.c=	-Wno-unused ${NO_WCONSTANT_CONVERSION}
+CWARNFLAGS.radeon_cp.c=	-Wno-unused ${NO_WCONSTANT_CONVERSION}
 CWARNFLAGS+=		${CWARNFLAGS.${.IMPSRC:T}}
diff --git a/sys/modules/drm/via/Makefile b/sys/modules/drm/via/Makefile
index b0524e53ec8..4b694f785c7 100644
--- a/sys/modules/drm/via/Makefile
+++ b/sys/modules/drm/via/Makefile
@@ -22,6 +22,6 @@ opt_drm.h:
 
 .include <bsd.kmod.mk>
 
-CWARNFLAGS.via_dma.c=		${NO_WUNUSED_VALUE}
-CWARNFLAGS.via_dmablit.c=	${NO_WUNUSED_VALUE}
+CWARNFLAGS.via_dma.c=		-Wno-unused-value
+CWARNFLAGS.via_dmablit.c=	-Wno-unused-value
 CWARNFLAGS+=			${CWARNFLAGS.${.IMPSRC:T}}