diff --git a/ir_gui.cc b/ir_gui.cc
index 74ff90a..0f482c6 100644
--- a/ir_gui.cc
+++ b/ir_gui.cc
@@ -1523,7 +1523,7 @@ static void cleanup(LV2UI_Handle ui) {
 	free(cp);
 }
 
-static LV2UI_Handle instantiate(const struct _LV2UI_Descriptor * descriptor,
+static LV2UI_Handle instantiate(const struct LV2UI_Descriptor * descriptor,
 				const char * plugin_uri,
 				const char * bundle_path,
 				LV2UI_Write_Function write_function,