diff --git a/utils/ipc/generators/libcamera_templates/module_ipa_proxy.cpp.tmpl b/utils/ipc/generators/libcamera_templates/module_ipa_proxy.cpp.tmpl
index 238cf4a5..01fe9c51 100644
--- a/utils/ipc/generators/libcamera_templates/module_ipa_proxy.cpp.tmpl
+++ b/utils/ipc/generators/libcamera_templates/module_ipa_proxy.cpp.tmpl
@@ -175,7 +175,8 @@ void {{proxy_name}}::recvMessage(const IPCMessage &data)
 );
 {% elif method|is_async %}
 	ASSERT(state_ == ProxyRunning);
-	proxy_.invokeMethod(&ThreadProxy::{{method.mojom_name}}, ConnectionTypeQueued,
+	proxy_.invokeMethod(&ThreadProxy::{{method.mojom_name}}, ConnectionTypeQueued
+	{%- if method|method_param_names|length > 0 -%}, {% endif -%}
 	{%- for param in method|method_param_names -%}
 		{{param}}{{- ", " if not loop.last}}
 	{%- endfor -%}