diff --git a/Makefile b/Makefile
index b06bd31..4e324b0 100644
--- a/Makefile
+++ b/Makefile
@@ -17,7 +17,7 @@ build/$(PROGRAM) :
 build-tools : build/thalos-tools
 
 build/thalos-tools :
-	$(GO) build $(GOBUILDFLAGS) -o $@ cmd/tools/main.go cmd/tools/bench.go
+	$(GO) build $(GOBUILDFLAGS) -o $@ cmd/tools/main.go cmd/tools/bench.go cmd/tools/validate.go
 
 install: build
 	install -D build/$(PROGRAM) $(DESTDIR)$(BINDIR)/$(PROGRAM)