diff --git a/libs/ardour/luabindings.cc b/libs/ardour/luabindings.cc
index 972a19218d..a70dd19f42 100644
--- a/libs/ardour/luabindings.cc
+++ b/libs/ardour/luabindings.cc
@@ -609,7 +609,9 @@ LuaBindings::common (lua_State* L)
 		.beginClass <Temporal::timepos_t> ("timepos_t")
 		.addConstructor <void (*) (Temporal::samplepos_t)> ()
 		.addOperator ("__add", CPPOPERATORALT(Temporal::timepos_t, Temporal::timecnt_t, +))
-		.addOperator ("__sub", CPPOPERATOR4(Temporal::timecnt_t, Temporal::timepos_t, Temporal::timepos_t, Temporal::timecnt_t, .distance))
+		/* timecnt_t distance (timecnt_t const & p) const;  is declared but not implemented */
+		//.addOperator ("__sub", CPPOPERATOR4(Temporal::timecnt_t, Temporal::timepos_t, Temporal::timepos_t, Temporal::timecnt_t, .distance))
+		.addOperator ("__sub", CPPOPERATOR2(Temporal::timecnt_t, Temporal::timepos_t, Temporal::timepos_t, .distance))
 		//.addOperator ("__mod", CPPOPERATOR2(Temporal::timepos_t, Temporal::timepos_t, Temporal::timecnt_t, %))
 		.addOperator ("__lt", CPPCOMPERATORALT(Temporal::timepos_t, Temporal::timecnt_t, <))
 		.addOperator ("__le", CPPCOMPERATORALT(Temporal::timepos_t, Temporal::timecnt_t, <=))