diff --git a/radio/src/strhelpers.cpp b/radio/src/strhelpers.cpp
index ba3cbb21a..894343547 100644
--- a/radio/src/strhelpers.cpp
+++ b/radio/src/strhelpers.cpp
@@ -486,7 +486,7 @@ char * getSourceString(char * dest, mixsrc_t idx)
   else {
     idx -= MIXSRC_FIRST_TELEM;
     div_t qr = div(idx, 3);
-    dest[0] = '\321';
+    dest[0] = CHAR_TELEMETRY;
     char  * pos = strAppend(&dest[1], g_model.telemetrySensors[qr.quot].label, sizeof(g_model.telemetrySensors[qr.quot].label));
     if (qr.rem) * pos = (qr.rem==2 ? '+' : '-');
     * ++pos = '\0';