diff --git a/Makefile b/Makefile
index 4b46d46..0f83570 100644
--- a/Makefile
+++ b/Makefile
@@ -93,7 +93,7 @@ test:
 		cd /yadm && \
 		py.test -v $(testargs); \
 	else \
-		if command -v "docker-compose" &> /dev/null; then \
+		if command -v "docker-compose" > /dev/null 2>&1; then \
 			docker-compose run --rm testbed make test testargs="$(testargs)"; \
 		else \
 			echo "Sorry, this make test requires docker-compose to be installed."; \
@@ -197,7 +197,7 @@ sync-clock:
 
 .PHONY: require-docker
 require-docker:
-	@if ! command -v "docker" &> /dev/null; then \
+	@if ! command -v "docker" > /dev/null 2>&1; then \
 		echo "Sorry, this make target requires docker to be installed."; \
 		false; \
 	fi