diff --git a/sys/dts/Makefile.inc b/sys/dts/Makefile.inc
index 2161751dc237..bb6fef4bbd20 100644
--- a/sys/dts/Makefile.inc
+++ b/sys/dts/Makefile.inc
@@ -5,9 +5,9 @@ SYSDIR?=${SRCTOP}/sys
 test-dts:
 .for dts in ${DTS}
 	@env MACHINE=`basename ${.CURDIR}` ${SYSDIR}/tools/fdt/make_dtb.sh ${SYSDIR} ${dts} /tmp
+.endfor
 
 test-dtso:
 .for dtso in ${DTSO}
 	@env MACHINE=`basename ${.CURDIR}` ${SYSDIR}/tools/fdt/make_dtbo.sh ${SYSDIR} ${dtso} /tmp
-
 .endfor
diff --git a/sys/dts/arm/Makefile b/sys/dts/arm/Makefile
index 03d156d94770..855f8847d514 100644
--- a/sys/dts/arm/Makefile
+++ b/sys/dts/arm/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-DTS!=ls *.dts
+DTS!=ls ${.CURDIR}/*.dts
 
 all: test-dts
 
diff --git a/sys/dts/arm/Makefile.inc b/sys/dts/arm/Makefile.inc
new file mode 100644
index 000000000000..265f86d1ed55
--- /dev/null
+++ b/sys/dts/arm/Makefile.inc
@@ -0,0 +1,3 @@
+# $FreeBSD$
+
+.include "../Makefile.inc"
diff --git a/sys/dts/arm/overlays/Makefile b/sys/dts/arm/overlays/Makefile
index aff6f3d459bc..cfc655929ef3 100644
--- a/sys/dts/arm/overlays/Makefile
+++ b/sys/dts/arm/overlays/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-DTSO!=ls *.dtso
+DTSO!=ls ${.CURDIR}/*.dtso
 
 all: test-dtso
 
diff --git a/sys/dts/arm64/Makefile b/sys/dts/arm64/Makefile
index 03d156d94770..855f8847d514 100644
--- a/sys/dts/arm64/Makefile
+++ b/sys/dts/arm64/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-DTS!=ls *.dts
+DTS!=ls ${.CURDIR}/*.dts
 
 all: test-dts
 
diff --git a/sys/dts/arm64/Makefile.inc b/sys/dts/arm64/Makefile.inc
new file mode 100644
index 000000000000..265f86d1ed55
--- /dev/null
+++ b/sys/dts/arm64/Makefile.inc
@@ -0,0 +1,3 @@
+# $FreeBSD$
+
+.include "../Makefile.inc"
diff --git a/sys/dts/arm64/overlays/Makefile b/sys/dts/arm64/overlays/Makefile
index aff6f3d459bc..cfc655929ef3 100644
--- a/sys/dts/arm64/overlays/Makefile
+++ b/sys/dts/arm64/overlays/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-DTSO!=ls *.dtso
+DTSO!=ls ${.CURDIR}/*.dtso
 
 all: test-dtso
 
diff --git a/sys/dts/mips/Makefile b/sys/dts/mips/Makefile
index 03d156d94770..855f8847d514 100644
--- a/sys/dts/mips/Makefile
+++ b/sys/dts/mips/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-DTS!=ls *.dts
+DTS!=ls ${.CURDIR}/*.dts
 
 all: test-dts
 
diff --git a/sys/dts/powerpc/Makefile b/sys/dts/powerpc/Makefile
index 03d156d94770..855f8847d514 100644
--- a/sys/dts/powerpc/Makefile
+++ b/sys/dts/powerpc/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-DTS!=ls *.dts
+DTS!=ls ${.CURDIR}/*.dts
 
 all: test-dts