diff --git a/bionic/x86_64/Dockerfile b/bionic/x86_64/Dockerfile
index f94b6e44147c70c989c471092d6c288b00b4e542..ba9a23412c501c87917ef57f7a3c9059c2670435 100644
--- a/bionic/x86_64/Dockerfile
+++ b/bionic/x86_64/Dockerfile
@@ -26,7 +26,7 @@ RUN groupadd -g 1000 build \
  && useradd -u 1000 -g 1000 -m build \
  && echo 'Defaults:build !requiretty' | tee -a /etc/sudoers \
  && echo 'build ALL=(ALL:ALL) NOPASSWD: ALL' | tee -a /etc/sudoers \
- && chown build.build /usr/local/bin \
+ && chown build.build /usr/local/bin
 
 USER build
 RUN git clone https://git.icinga.com/build-docker/scripts.git /usr/local/bin