diff --git a/indra/llcommon/lleventdispatcher.h b/indra/llcommon/lleventdispatcher.h
index f1e4fe2df7..1b3e834aeb 100644
--- a/indra/llcommon/lleventdispatcher.h
+++ b/indra/llcommon/lleventdispatcher.h
@@ -192,8 +192,7 @@ public:
     template<typename Method, typename InstanceGetter>
     typename std::enable_if<
         boost::function_types::is_member_function_pointer<Method>::value &&
-        ! std::is_same<InstanceGetter, LLSD>::value &&
-        ! std::is_same<InstanceGetter, LLSDMap>::value
+        ! std::is_convertible<InstanceGetter, LLSD>::value
         >::type add(const std::string& name,
                     const std::string& desc,
                     Method f,
@@ -247,8 +246,7 @@ public:
     template<typename Method, typename InstanceGetter>
     typename std::enable_if<
         boost::function_types::is_member_function_pointer<Method>::value &&
-        ! std::is_same<InstanceGetter, LLSD>::value &&
-        ! std::is_same<InstanceGetter, LLSDMap>::value
+        ! std::is_convertible<InstanceGetter, LLSD>::value
         >::type add(const std::string& name,
                     const std::string& desc,
                     Method f,
@@ -492,8 +490,7 @@ LLEventDispatcher::add(const std::string& name, const std::string& desc, Functio
 template<typename Method, typename InstanceGetter>
 typename std::enable_if<
     boost::function_types::is_member_function_pointer<Method>::value &&
-    ! std::is_same<InstanceGetter, LLSD>::value &&
-    ! std::is_same<InstanceGetter, LLSDMap>::value
+    ! std::is_convertible<InstanceGetter, LLSD>::value
 >::type
 LLEventDispatcher::add(const std::string& name, const std::string& desc, Method f,
                        const InstanceGetter& getter)
@@ -516,8 +513,7 @@ LLEventDispatcher::add(const std::string& name, const std::string& desc, Functio
 template<typename Method, typename InstanceGetter>
 typename std::enable_if<
     boost::function_types::is_member_function_pointer<Method>::value &&
-    ! std::is_same<InstanceGetter, LLSD>::value &&
-    ! std::is_same<InstanceGetter, LLSDMap>::value
+    ! std::is_convertible<InstanceGetter, LLSD>::value
 >::type
 LLEventDispatcher::add(const std::string& name, const std::string& desc, Method f,
                        const InstanceGetter& getter,