diff --git a/docker/win32/Dockerfile b/docker/win32/Dockerfile
index c70c5f12..321d5c51 100644
--- a/docker/win32/Dockerfile
+++ b/docker/win32/Dockerfile
@@ -9,7 +9,7 @@ FROM debian:latest
 
 # prepare system
 RUN apt-get update && apt-get -y install bash \
-  rsync vim screen git make automake \
+  rsync vim screen git make automake
 
 # [*] source build tools
 
diff --git a/docker/win64/Dockerfile b/docker/win64/Dockerfile
index 9262cc27..891700b7 100644
--- a/docker/win64/Dockerfile
+++ b/docker/win64/Dockerfile
@@ -9,7 +9,7 @@ FROM debian:latest
 
 # prepare system
 RUN apt-get update && apt-get -y install bash \
-  rsync vim screen git make automake \
+  rsync vim screen git make automake
 
 # [*] source build tools