diff --git a/sys/conf/dtb.mk b/sys/conf/dtb.mk
index 20a52b79d8c5..f072bd200557 100644
--- a/sys/conf/dtb.mk
+++ b/sys/conf/dtb.mk
@@ -58,8 +58,8 @@ all: ${DTB} ${DTBO}
 .export DTC
 .for _dts in ${DTS}
 ${_dts:R:S/$/.dtb/}:	${_dts} ${OP_META}
-	@echo Generating ${.TARGET} from ${_dts}
-	@${SYSDIR}/tools/fdt/make_dtb.sh ${SYSDIR} ${_dts} ${.OBJDIR}
+	@${ECHO} Generating ${.TARGET} from ${_dts}
+	@env ECHO=${ECHO} ${SYSDIR}/tools/fdt/make_dtb.sh ${SYSDIR} ${_dts} ${.OBJDIR}
 CLEANFILES+=${_dts:R:S/$/.dtb/}
 .endfor
 .endif
@@ -68,8 +68,8 @@ CLEANFILES+=${_dts:R:S/$/.dtb/}
 .export DTC
 .for _dtso in ${DTSO}
 ${_dtso:R:S/$/.dtbo/}:	${_dtso} ${OP_META}
-	@echo Generating ${.TARGET} from ${_dtso}
-	@${SYSDIR}/tools/fdt/make_dtbo.sh ${SYSDIR} overlays/${_dtso} ${.OBJDIR}
+	@${ECHO} Generating ${.TARGET} from ${_dtso}
+	@env ECHO=${ECHO} ${SYSDIR}/tools/fdt/make_dtbo.sh ${SYSDIR} overlays/${_dtso} ${.OBJDIR}
 CLEANFILES+=${_dtso:R:S/$/.dtbo/}
 .endfor
 .endif
diff --git a/sys/tools/fdt/make_dtb.sh b/sys/tools/fdt/make_dtb.sh
index cb1d2d76441d..a7f5a183c17c 100755
--- a/sys/tools/fdt/make_dtb.sh
+++ b/sys/tools/fdt/make_dtb.sh
@@ -17,10 +17,11 @@ if [ -z "${MACHINE}" ]; then
 fi
 
 : ${DTC:=dtc}
+: ${ECHO:=echo}
 
 for d in ${dts}; do
     dtb=${dtb_path}/`basename $d .dts`.dtb
-    echo "converting $d -> $dtb"
+    ${ECHO} "converting $d -> $dtb"
     cpp -P -x assembler-with-cpp -I $S/gnu/dts/include -I $S/dts/${MACHINE} -I $S/gnu/dts/${MACHINE} -I $S/gnu/dts/ -include $d /dev/null | 
 	${DTC} -@ -O dtb -o $dtb -b 0 -p 1024 -i $S/dts/${MACHINE} -i $S/gnu/dts/${MACHINE} -i $S/gnu/dts/
 done
diff --git a/sys/tools/fdt/make_dtbo.sh b/sys/tools/fdt/make_dtbo.sh
index 3a438ac5d5aa..eb1ec1ed3180 100755
--- a/sys/tools/fdt/make_dtbo.sh
+++ b/sys/tools/fdt/make_dtbo.sh
@@ -17,10 +17,11 @@ if [ -z "${MACHINE}" ]; then
 fi
 
 : ${DTC:=dtc}
+: ${ECHO:=echo}
 
 for d in ${dtso}; do
     dtb=${dtbo_path}/`basename $d .dtso`.dtbo
-    echo "converting $d -> $dtb"
+    ${ECHO} "converting $d -> $dtb"
     cpp -P -x assembler-with-cpp -I $S/gnu/dts/include -I $S/dts/${MACHINE} -I $S/gnu/dts/${MACHINE} -include $d /dev/null | 
 	${DTC} -@ -O dtb -o $dtb -i $S/dts/${MACHINE} -i $S/gnu/dts/${MACHINE}
 done