diff --git a/django/core/validators.py b/django/core/validators.py
index d1246d8f55a..b36f0009722 100644
--- a/django/core/validators.py
+++ b/django/core/validators.py
@@ -457,7 +457,7 @@ class RelaxNGCompact:
         display_errors = []
         lines = field_data.split('\n')
         for error in errors:
-            _, line, level, message = error.split(':', 3)
+            ignored, line, level, message = error.split(':', 3)
             # Scrape the Jing error messages to reword them more nicely.
             m = re.search(r'Expected "(.*?)" to terminate element starting on line (\d+)', message)
             if m: