diff --git a/esphome/components/esp32_ble/ble.cpp b/esphome/components/esp32_ble/ble.cpp
index 5227350b55..a9af66091c 100644
--- a/esphome/components/esp32_ble/ble.cpp
+++ b/esphome/components/esp32_ble/ble.cpp
@@ -289,11 +289,10 @@ bool ESP32BLE::ble_setup_() {
         // Keep first 13 chars and last 7 chars (MAC suffix), remove middle
         memcpy(name_buffer, app_name.c_str(), 13);
         memcpy(name_buffer + 13, app_name.c_str() + name_len - 7, 7);
-        name_buffer[20] = '\0';
       } else {
         memcpy(name_buffer, app_name.c_str(), 20);
-        name_buffer[20] = '\0';
       }
+      name_buffer[20] = '\0';
     } else {
       memcpy(name_buffer, app_name.c_str(), name_len + 1);  // Include null terminator
     }