diff --git a/dist/tools/ethos/Makefile b/dist/tools/ethos/Makefile
index 804f4aa4cc9a..f9862c030179 100644
--- a/dist/tools/ethos/Makefile
+++ b/dist/tools/ethos/Makefile
@@ -2,3 +2,6 @@ all: ethos
 
 ethos: ethos.c
 	$(CC) -O3 -Wall ethos.c -o ethos
+
+clean:
+	rm -f ethos