diff --git a/gtk2_ardour/lv2_plugin_ui.cc b/gtk2_ardour/lv2_plugin_ui.cc
index 1455c603d7..4a03ae93a5 100644
--- a/gtk2_ardour/lv2_plugin_ui.cc
+++ b/gtk2_ardour/lv2_plugin_ui.cc
@@ -36,7 +36,11 @@
 
 #include "gtkmm2ext/utils.h"
 
-#include "lv2/lv2plug.in/ns/extensions/ui/ui.h"
+#ifdef HAVE_LV2_1_18_6
+#include <lv2/ui/ui.h>
+#else
+#include <lv2/lv2plug.in/ns/extensions/ui/ui.h>
+#endif
 
 #include <lilv/lilv.h>
 #include <suil/suil.h>
diff --git a/gtk2_ardour/lv2_plugin_ui.h b/gtk2_ardour/lv2_plugin_ui.h
index 7e910c1467..51b2d4b061 100644
--- a/gtk2_ardour/lv2_plugin_ui.h
+++ b/gtk2_ardour/lv2_plugin_ui.h
@@ -42,7 +42,11 @@
 
 #include "lv2_external_ui.h"
 
-#include "lv2/lv2plug.in/ns/extensions/ui/ui.h"
+#ifdef HAVE_LV2_1_18_6
+#include <lv2/ui/ui.h>
+#else
+#include <lv2/lv2plug.in/ns/extensions/ui/ui.h>
+#endif
 
 namespace ARDOUR {
 	class LV2Plugin;