diff --git a/radio/src/functions.cpp b/radio/src/functions.cpp
index 782aa42d9..e397cb76c 100644
--- a/radio/src/functions.cpp
+++ b/radio/src/functions.cpp
@@ -412,8 +412,8 @@ void evalFunctions()
 #endif
               }
             }
-            else if (CFN_PARAM(cfn) >= MIXSRC_TrimRud && CFN_PARAM(cfn) <= MIXSRC_TrimAil) {
-              trimGvar[CFN_PARAM(cfn)-MIXSRC_TrimRud] = CFN_GVAR_INDEX(cfn);
+            else if (CFN_PARAM(cfn) >= MIXSRC_FIRST_TRIM && CFN_PARAM(cfn) <= MIXSRC_LAST_TRIM) {
+              trimGvar[CFN_PARAM(cfn)-MIXSRC_FIRST_TRIM] = CFN_GVAR_INDEX(cfn);
             }
 #if defined(ROTARY_ENCODERS)
             else if (CFN_PARAM(cfn) >= MIXSRC_REa && CFN_PARAM(cfn) < MIXSRC_TrimRud) {