diff --git a/libraries/SITL/SIM_Buzzer.cpp b/libraries/SITL/SIM_Buzzer.cpp
index 39f0cbd3e4..0cd1545052 100644
--- a/libraries/SITL/SIM_Buzzer.cpp
+++ b/libraries/SITL/SIM_Buzzer.cpp
@@ -40,6 +40,8 @@ namespace BuzzerSynth {
 
 using namespace SITL;
 
+#ifdef WITH_SITL_TONEALARM
+
 // table of user settable parameters
 const AP_Param::GroupInfo Buzzer::var_info[] = {
 
@@ -60,8 +62,6 @@ const AP_Param::GroupInfo Buzzer::var_info[] = {
     AP_GROUPEND
 };
 
-#ifdef WITH_SITL_TONEALARM
-
 static sf::SoundBuffer xsoundBuffer;
 static sf::Sound xdemoSound;
 
@@ -126,6 +126,8 @@ void Buzzer::update(const struct sitl_input &input)
 
 using namespace SITL;
 
+const AP_Param::GroupInfo Buzzer::var_info[] = { AP_GROUPEND };
+
 Buzzer::Buzzer() { };
 
 void Buzzer::update(const struct sitl_input &input) {}