diff --git a/Rover/Parameters.cpp b/Rover/Parameters.cpp
index 5f24887181c8c5..a093feb4ad8cf5 100644
--- a/Rover/Parameters.cpp
+++ b/Rover/Parameters.cpp
@@ -274,9 +274,7 @@ const AP_Param::Info Rover::var_info[] = {
     GOBJECTN(_gcs.chan_parameters[6],  gcs6,       "SR6_",     GCS_MAVLINK_Parameters),
 #endif
 
-    // @Group: SERIAL
-    // @Path: ../libraries/AP_SerialManager/AP_SerialManager.cpp
-    GOBJECT(serial_manager,         "SERIAL",   AP_SerialManager),
+    // AP_SerialManager was here
 
     // @Group: RNGFND
     // @Path: ../libraries/AP_RangeFinder/AP_RangeFinder.cpp
@@ -909,4 +907,13 @@ void Rover::load_parameters(void)
     AP_Param::convert_class(g.k_param_logger, &logger, logger.var_info, 0, true);
 #endif
 
+    static const AP_Param::TopLevelObjectConversion toplevel_conversions[] {
+#if AP_SERIALMANAGER_ENABLED
+        // PARAMETER_CONVERSION - Added: Feb-2024 for Rover-4.6
+        { &serial_manager, serial_manager.var_info, Parameters::.k_param_serial_manager_old },
+#endif
+    };
+
+    AP_Param::convert_toplevel_objects(toplevel_conversions, ARRAY_SIZE(toplevel_conversions));
+
 }
diff --git a/Rover/Parameters.h b/Rover/Parameters.h
index 19067a2c4b45b5..fdc817ff62413a 100644
--- a/Rover/Parameters.h
+++ b/Rover/Parameters.h
@@ -89,7 +89,7 @@ class Parameters {
         k_param_gcs2,               // stream rates for SERIAL2
         k_param_serial2_baud_old,   // unused
         k_param_serial2_protocol,   // deprecated, can be deleted
-        k_param_serial_manager,     // serial manager library
+        k_param_serial_manager_old,     // serial manager library
         k_param_cli_enabled_old,    // unused
         k_param_gcs3,
         k_param_gcs_pid_mask,