diff --git a/contrib/Dockerfile.builder b/contrib/Dockerfile.builder
index 8b844484d..07fb77846 100644
--- a/contrib/Dockerfile.builder
+++ b/contrib/Dockerfile.builder
@@ -8,6 +8,7 @@ RUN apt-get -qq update && \
     apt-get -qq install --no-install-recommends --allow-unauthenticated -yy \
 	autoconf \
 	automake \
+	clang \
 	eatmydata \
 	software-properties-common \
 	build-essential \
diff --git a/contrib/Dockerfile.builder.i386 b/contrib/Dockerfile.builder.i386
index 1a91fd9f9..fae58a681 100644
--- a/contrib/Dockerfile.builder.i386
+++ b/contrib/Dockerfile.builder.i386
@@ -8,6 +8,7 @@ RUN apt-get -qq update && \
     apt-get -qq install --no-install-recommends --allow-unauthenticated -yy \
 	autoconf \
 	automake \
+	clang \
 	eatmydata \
 	software-properties-common \
 	build-essential \