diff --git a/Dockerfile.bird_exporter b/Dockerfile.bird_exporter
index 7ee4d74..0cf6358 100644
--- a/Dockerfile.bird_exporter
+++ b/Dockerfile.bird_exporter
@@ -1,4 +1,4 @@
-ROM golang as builder
+FROM golang as builder
 
 WORKDIR /go/
 RUN git clone -b 1.4.1 https://github.com/czerwonk/bird_exporter.git