diff --git a/radio/src/gui/colorlcd/input_mix_group.cpp b/radio/src/gui/colorlcd/input_mix_group.cpp
index 723a27fb4..9fb78a229 100644
--- a/radio/src/gui/colorlcd/input_mix_group.cpp
+++ b/radio/src/gui/colorlcd/input_mix_group.cpp
@@ -57,7 +57,7 @@ InputMixGroup::InputMixGroup(Window* parent, mixsrc_t idx) :
   if (idx >= MIXSRC_FIRST_CH && idx <= MIXSRC_LAST_CH
       && g_model.limitData[idx - MIXSRC_FIRST_CH].name[0] != '\0') {
     chText = lv_label_create(lvobj);
-    lv_label_set_text_fmt(chText, TR_CH "%zu", (size_t)(idx - MIXSRC_FIRST_CH + 1));
+    lv_label_set_text_fmt(chText, TR_CH "%" PRIu32, UINT32_C(idx - MIXSRC_FIRST_CH + 1));
     lv_obj_set_style_text_font(chText, getFont(FONT(XS)), 0);
 #if LCD_H > LCD_W
     lv_obj_set_style_pad_bottom(chText, -2, 0);
diff --git a/radio/src/gui/common/stdlcd/radio_version.cpp b/radio/src/gui/common/stdlcd/radio_version.cpp
index 74f730f49..63dafee50 100644
--- a/radio/src/gui/common/stdlcd/radio_version.cpp
+++ b/radio/src/gui/common/stdlcd/radio_version.cpp
@@ -162,8 +162,8 @@ void menuRadioModulesVersion(event_t event)
 #if defined(CROSSFIRE)
       if (isModuleCrossfire(module)) {
         char statusText[64] = "";
-        sprintf(statusText, "%d Hz %zu Err",
-                1000000 / getMixerSchedulerPeriod(), (size_t)0/*telemetryErrors*/);
+        sprintf(statusText, "%d Hz"/* %" PRIu32" Err"*/,
+                1000000 / getMixerSchedulerPeriod()/*, UINT32_C(telemetryErrors)*/);
         lcdDrawText(COLUMN2_X, y, statusText);
         y += FH;
         continue;