diff --git a/radio/src/lua/api_model.cpp b/radio/src/lua/api_model.cpp
index c4f8c3aea..a4a5c627c 100644
--- a/radio/src/lua/api_model.cpp
+++ b/radio/src/lua/api_model.cpp
@@ -842,10 +842,11 @@ Get configuration for specified Mix
  * `mixWarn` (number) warning (0 = off, 1 = 1 beep, .. 3 = 3 beeps)
  * `delayUp` (number) delay up (time in 1/10 s)
  * `delayDown` (number) delay down
+ * `speedPrec` precision of speed up/down (1 or 10)
  * `speedUp` (number) speed up
  * `speedDown` (number) speed down
 
-@status current Introduced in 2.0.0, parameters below `multiplex` added in 2.0.13
+@status current Introduced in 2.0.0, parameters below `multiplex` added in 2.0.13, `speedPrec` added in 2.10
 */
 static int luaModelGetMix(lua_State *L)
 {
@@ -869,6 +870,7 @@ static int luaModelGetMix(lua_State *L)
     lua_pushtableinteger(L, "mixWarn", mix->mixWarn);
     lua_pushtableinteger(L, "delayUp", mix->delayUp);
     lua_pushtableinteger(L, "delayDown", mix->delayDown);
+    lua_pushtableinteger(L, "speedPrec", mix->speedPrec);
     lua_pushtableinteger(L, "speedUp", mix->speedUp);
     lua_pushtableinteger(L, "speedDown", mix->speedDown);
   }
@@ -959,6 +961,9 @@ static int luaModelInsertMix(lua_State *L)
       else if (!strcmp(key, "delayDown")) {
         mix->delayDown = luaL_checkinteger(L, -1);
       }
+      else if (!strcmp(key, "speedPrec")) {
+        mix->speedPrec = luaL_checkinteger(L, -1);
+      }
       else if (!strcmp(key, "speedUp")) {
         mix->speedUp = luaL_checkinteger(L, -1);
       }