diff --git a/CHANGELOG.md b/CHANGELOG.md
index 62d762a0..fc3d06dd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -38,6 +38,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Stream validation now returns original URL instead of redirected URL to prevent issues with temporary redirect URLs that expire before clients can connect
 - XtreamCodes EPG limit parameter now properly converted to integer to prevent type errors when accessing EPG listings (Fixes #781)
 - Stream validation now continues with GET request if HEAD request fails due to connection issues - Thanks [@kvnnap](https://github.com/kvnnap) (Fixes #782)
+- XtreamCodes M3U files now correctly set `x-tvg-url` and `url-tvg` headers to reference XC EPG URL (`xmltv.php`) instead of standard EPG endpoint when downloaded via XC API (Fixes #629)
 
 ## [0.15.1] - 2025-12-22
 
diff --git a/apps/output/views.py b/apps/output/views.py
index bd36b86c..ca222ed5 100644
--- a/apps/output/views.py
+++ b/apps/output/views.py
@@ -174,16 +174,26 @@ def generate_m3u(request, profile_name=None, user=None):
     tvg_id_source = request.GET.get('tvg_id_source', 'channel_number').lower()
 
     # Build EPG URL with query parameters if needed
-    epg_base_url = build_absolute_uri_with_port(request, reverse('output:epg_endpoint', args=[profile_name]) if profile_name else reverse('output:epg_endpoint'))
+    # Check if this is an XC API request (has username/password in GET params and user is authenticated)
+    xc_username = request.GET.get('username')
+    xc_password = request.GET.get('password')
 
-    # Optionally preserve certain query parameters
-    preserved_params = ['tvg_id_source', 'cachedlogos', 'days']
-    query_params = {k: v for k, v in request.GET.items() if k in preserved_params}
-    if query_params:
-        from urllib.parse import urlencode
-        epg_url = f"{epg_base_url}?{urlencode(query_params)}"
+    if user is not None and xc_username and xc_password:
+        # This is an XC API request - use XC-style EPG URL
+        base_url = request.build_absolute_uri('/')[:-1]
+        epg_url = f"{base_url}/xmltv.php?username={xc_username}&password={xc_password}"
     else:
-        epg_url = epg_base_url
+        # Regular request - use standard EPG endpoint
+        epg_base_url = build_absolute_uri_with_port(request, reverse('output:epg_endpoint', args=[profile_name]) if profile_name else reverse('output:epg_endpoint'))
+
+        # Optionally preserve certain query parameters
+        preserved_params = ['tvg_id_source', 'cachedlogos', 'days']
+        query_params = {k: v for k, v in request.GET.items() if k in preserved_params}
+        if query_params:
+            from urllib.parse import urlencode
+            epg_url = f"{epg_base_url}?{urlencode(query_params)}"
+        else:
+            epg_url = epg_base_url
 
     # Add x-tvg-url and url-tvg attribute for EPG URL
     m3u_content = f'#EXTM3U x-tvg-url="{epg_url}" url-tvg="{epg_url}"\n'