diff --git a/plugins/stk/mallets/mallets.h b/plugins/stk/mallets/mallets.h
index 937d6686c..f40d89152 100644
--- a/plugins/stk/mallets/mallets.h
+++ b/plugins/stk/mallets/mallets.h
@@ -36,6 +36,12 @@
 #include "note_play_handle.h"
 #include "led_checkbox.h"
 
+// As of Stk 4.4 all classes and types have been moved to the namespace "stk".
+// However in older versions this namespace does not exist, therefore declare it
+// so this plugin builds with all versions of Stk.
+namespace stk { } ;
+using namespace stk;
+
 
 class malletsSynth
 {