diff --git a/App/ui/helper.c b/App/ui/helper.c
index 5f2d46c7..cbb0ee27 100644
--- a/App/ui/helper.c
+++ b/App/ui/helper.c
@@ -54,13 +54,13 @@ void UI_GenerateChannelStringEx(char *pString, const bool bShowPrefix, const uin
 
     if (bShowPrefix) {
         // BUG here? Prefixed NULLs are allowed
-        sprintf(pString, "CH-%03u", ChannelNumber + 1);
+        sprintf(pString, "CH-%04u", ChannelNumber + 1);
     } else if (ChannelNumber == MR_CHANNEL_LAST + 1) {
         strcpy(pString, "None");
     } else if (ChannelNumber == 0xFFFF) {
         strcpy(pString, "NULL");
     } else {
-        sprintf(pString, "%03u", ChannelNumber + 1);
+        sprintf(pString, "%04u", ChannelNumber + 1);
     }
 }
 
diff --git a/App/ui/main.c b/App/ui/main.c
index 9d0e56d9..93218ce5 100644
--- a/App/ui/main.c
+++ b/App/ui/main.c
@@ -1007,7 +1007,7 @@ void UI_DisplayMain(void)
                         break;
 
                     case MDF_CHANNEL:   // show the channel number
-                        sprintf(String, "CH-%03u", gEeprom.ScreenChannel[vfo_num] + 1);
+                        sprintf(String, "CH-%04u", gEeprom.ScreenChannel[vfo_num] + 1);
                         UI_PrintString(String, 36, 0, line, 8);
                         break;
 
@@ -1017,7 +1017,7 @@ void UI_DisplayMain(void)
                         SETTINGS_FetchChannelName(String, gEeprom.ScreenChannel[vfo_num]);
                         if (String[0] == 0)
                         {   // no channel name, show the channel number instead
-                            sprintf(String, "CH-%03u", gEeprom.ScreenChannel[vfo_num] + 1);
+                            sprintf(String, "CH-%04u", gEeprom.ScreenChannel[vfo_num] + 1);
                         }
 
                         if (gEeprom.CHANNEL_DISPLAY_MODE == MDF_NAME) {