diff --git a/devc.sh b/devc.sh
index a5d0191..af83c0b 100755
--- a/devc.sh
+++ b/devc.sh
@@ -54,7 +54,7 @@ param_args() {
       arg "-e HOST_HOME=$HOME" # Use to translate paths.
       arg "-e DBUS_SESSION_BUS_ADDRESS='unix:path=/tmp/bus'"
       ;;
-    -x11)
+    -x11) # Enable X11 support.
       arg "-e DISPLAY=$DISPLAY"
       arg "-v /tmp/.X11-unix:/tmp/.X11-unix"
       arg "-e XAUTHORITY=/run/user/1000/.Xauthority"
@@ -80,6 +80,7 @@ fi
 # provided, use the last used name when possible.
 if [[ $# -gt 0 ]] && [[ ${1:-} != -* ]]; then
   image="$1"
+  [[ "$image" != *:* ]] && image="$image:main"
   echo "$image" >"$HOME/.local/share/devc-previous-container"
   shift
 elif [ -f "$HOME/.local/share/devc-previous-container" ]; then
@@ -95,7 +96,7 @@ name="${image%:*}"
 if [ "$(podman container inspect "$name" -f {{.State.Running}} 2>&1)" != 'true' ] || [[ $# -gt 0 ]]; then
   log "starting devcontainer..."
   podman container rm -f -t 0 "$name" 1>/dev/null
-  podman run -td $(default_args) $(param_args $@) "$registry/$name"
+  podman run -td $(default_args) $(param_args $@) "$registry/$image"
 fi
 
 podman exec -it "$name" bash -l