diff --git a/scripts/completion/dvc.zsh b/scripts/completion/dvc.zsh
index 3ed1a56eaa..8e6fbfbe5d 100644
--- a/scripts/completion/dvc.zsh
+++ b/scripts/completion/dvc.zsh
@@ -34,6 +34,7 @@ _dvc_commands() {
     "pipeline:Manage pipelines."
     "pull:Pull data files from a DVC remote storage."
     "push:Push data files to a DVC remote storage."
+    "plot:Generate plot for metrics structured as JSON, CSV or TSV."
     "remote:Manage remote storage configuration."
     "remove:Remove outputs of DVC-file."
     "repro:Check for changes and reproduce DVC-file and dependencies."
@@ -206,6 +207,10 @@ _dvc_push=(
   "*:Stages:_files -g '(*.dvc|Dvcfile)'"
 )
 
+_dvc_plot=(
+  "1:Sub command:(show diff)"
+)
+
 _dvc_remote=(
   "1:Sub command:(add default remove modify list)"
 )
@@ -310,6 +315,7 @@ case $words[1] in
   pipeline) _arguments $_dvc_global_options $_dvc_pipeline ;;
   pull) _arguments $_dvc_global_options $_dvc_pull ;;
   push) _arguments $_dvc_global_options $_dvc_push ;;
+  plot) _arguments $_dvc_global_options $_dvc_plot ;;
   remote) _arguments $_dvc_global_options $_dvc_remote ;;
   remove) _arguments $_dvc_global_options $_dvc_remove ;;
   repro) _arguments $_dvc_global_options $_dvc_repro ;;