diff --git a/doc/pages/scopes.asciidoc b/doc/pages/scopes.asciidoc
index 02bb5470..c74a7c21 100644
--- a/doc/pages/scopes.asciidoc
+++ b/doc/pages/scopes.asciidoc
@@ -39,7 +39,9 @@ Scopes are named as follows:
 *local*::
     A local scope is inserted by each *evaluate-commands* invocations
     for its duration. Nested *evaluate-commands* each inject a new
-    local scope whose parent is the previous local scope.
+    local scope whose parent is the previous local scope. User declared
+    commands defined with *define-command* also introduce a local scope
+    while executing.
 
     A local scope is intended for temporarily overwriting some scoped
     value, such as an option or an alias.
diff --git a/src/commands.cc b/src/commands.cc
index d8335664..373f3b5c 100644
--- a/src/commands.cc
+++ b/src/commands.cc
@@ -1404,6 +1404,7 @@ void define_command(const ParametersParser& parser, Context& context, const Shel
 
         desc = ParameterDesc{ {}, ParameterDesc::Flags::SwitchesAsPositional, min, max };
         cmd = [=](const ParametersParser& parser, Context& context, const ShellContext& sc) {
+            LocalScope local_scope{context};
             CommandManager::instance().execute(commands, context,
                                                { params_to_shell(parser), sc.env_vars });
         };
@@ -1412,6 +1413,7 @@ void define_command(const ParametersParser& parser, Context& context, const Shel
     {
         desc = ParameterDesc{ {}, ParameterDesc::Flags::SwitchesAsPositional, 0, 0 };
         cmd = [=](const ParametersParser& parser, Context& context, const ShellContext& sc) {
+            LocalScope local_scope{context};
             CommandManager::instance().execute(commands, context, { {}, sc.env_vars });
         };
     }