diff --git a/radio/src/gui/common/stdlcd/popups.cpp b/radio/src/gui/common/stdlcd/popups.cpp
index abd7890da..448a7c753 100644
--- a/radio/src/gui/common/stdlcd/popups.cpp
+++ b/radio/src/gui/common/stdlcd/popups.cpp
@@ -27,7 +27,6 @@ void (*popupFunc)(event_t event) = NULL;
 const char * popupMenuItems[POPUP_MENU_MAX_LINES];
 uint8_t s_menu_item = 0;
 uint16_t popupMenuNoItems = 0;
-uint8_t popupMenuFlags = 0;
 uint16_t popupMenuOffset = 0;
 void (*popupMenuHandler)(const char * result);
 
@@ -116,7 +115,6 @@ const char * runPopupMenu(event_t event)
     case EVT_KEY_BREAK(KEY_EXIT):
       popupMenuNoItems = 0;
       s_menu_item = 0;
-      popupMenuFlags = 0;
       popupMenuOffset = 0;
       break;
   }
diff --git a/radio/src/opentx.h b/radio/src/opentx.h
index e2d79bc14..5e6b68a0b 100644
--- a/radio/src/opentx.h
+++ b/radio/src/opentx.h
@@ -1116,6 +1116,8 @@ union ReusableBuffer
   struct {
     char msg[64];
     uint8_t r9mPower;
+    char pxx2_candidate_receivers[5][8];
+    uint8_t pxx2_candidate_receivers_count;
   } modelsetup;
 
   // 103 bytes
diff --git a/radio/src/pulses/pxx2.cpp b/radio/src/pulses/pxx2.cpp
index 1e869e3d3..fd672d567 100644
--- a/radio/src/pulses/pxx2.cpp
+++ b/radio/src/pulses/pxx2.cpp
@@ -75,6 +75,12 @@ void Pxx2Pulses::setupRegisterFrame(uint8_t module)
 void Pxx2Pulses::setupBindFrame(uint8_t module)
 {
   addFrameType(PXX2_TYPE_C_MODULE, PXX2_TYPE_ID_BIND);
+
+  Pxx2Transport::addByte(0x00);
+  for (uint8_t i=0; i<LEN_REGISTRATION_ID; i++) {
+    Pxx2Transport::addByte(g_model.modelRegistrationID[i]);
+  }
+
 }
 
 void Pxx2Pulses::setupFrame(uint8_t module)