diff --git a/spec/strategies/completion_spec.rb b/spec/strategies/completion_spec.rb
index e8cc8ce..2be358a 100644
--- a/spec/strategies/completion_spec.rb
+++ b/spec/strategies/completion_spec.rb
@@ -20,6 +20,23 @@ describe 'the `completion` suggestion strategy' do
     wait_for { session.content }.to eq("baz \\\nbar")
   end
 
+  context 'when `_complete` is aliased' do
+    let(:before_sourcing) do
+      -> do
+        session.
+          run_command('autoload compinit && compinit').
+          run_command('_foo() { compadd bar; compadd bat }').
+          run_command('compdef _foo baz').
+          run_command('alias _complete=_complete')
+      end
+    end
+
+    it 'suggests the first completion result' do
+      session.send_string('baz ')
+      wait_for { session.content }.to eq('baz bar')
+    end
+  end
+
   context 'when async mode is enabled' do
     let(:options) { ['ZSH_AUTOSUGGEST_USE_ASYNC=true', 'ZSH_AUTOSUGGEST_STRATEGY=completion'] }
 
diff --git a/src/strategies/completion.zsh b/src/strategies/completion.zsh
index 4c60e90..dfbf6eb 100644
--- a/src/strategies/completion.zsh
+++ b/src/strategies/completion.zsh
@@ -86,7 +86,7 @@ _zsh_autosuggest_capture_completion_async() {
 	# https://stackoverflow.com/a/7057118/154703
 	autoload +X _complete
 	functions[_original_complete]=$functions[_complete]
-	_complete () {
+	function _complete() {
 		unset 'compstate[vared]'
 		_original_complete "$@"
 	}
diff --git a/zsh-autosuggestions.zsh b/zsh-autosuggestions.zsh
index ce1e83e..318990b 100644
--- a/zsh-autosuggestions.zsh
+++ b/zsh-autosuggestions.zsh
@@ -568,7 +568,7 @@ _zsh_autosuggest_capture_completion_async() {
 	# https://stackoverflow.com/a/7057118/154703
 	autoload +X _complete
 	functions[_original_complete]=$functions[_complete]
-	_complete () {
+	function _complete() {
 		unset 'compstate[vared]'
 		_original_complete "$@"
 	}