diff --git a/homeassistant/components/mqtt/config_flow.py b/homeassistant/components/mqtt/config_flow.py
index 7fe01e9a890..5947bfb3da9 100644
--- a/homeassistant/components/mqtt/config_flow.py
+++ b/homeassistant/components/mqtt/config_flow.py
@@ -1611,6 +1611,7 @@ def async_is_pem_data(data: bytes) -> bool:
     return (
         b"-----BEGIN CERTIFICATE-----" in data
         or b"-----BEGIN PRIVATE KEY-----" in data
+        or b"-----BEGIN EC PRIVATE KEY-----" in data
         or b"-----BEGIN RSA PRIVATE KEY-----" in data
         or b"-----BEGIN ENCRYPTED PRIVATE KEY-----" in data
     )