diff --git a/crates/assistant/src/slash_command/docs_command.rs b/crates/assistant/src/slash_command/docs_command.rs
index c7e90edfd7..53b02eb128 100644
--- a/crates/assistant/src/slash_command/docs_command.rs
+++ b/crates/assistant/src/slash_command/docs_command.rs
@@ -121,6 +121,14 @@ impl SlashCommand for DocsSlashCommand {
             match args {
                 DocsSlashCommandArgs::NoProvider => {
                     let providers = indexed_docs_registry.list_providers();
+                    if providers.is_empty() {
+                        return Ok(vec![ArgumentCompletion {
+                            label: "No available docs providers.".to_string(),
+                            new_text: String::new(),
+                            run_command: false,
+                        }]);
+                    }
+
                     Ok(providers
                         .into_iter()
                         .map(|provider| ArgumentCompletion {