1 files changed, 5 insertions, 0 deletions
diff --git a/sphinx/errors.py b/sphinx/errors.py
index 7652e93cb..83c1bd9da 100644
--- a/sphinx/errors.py
+++ b/sphinx/errors.py
@@ -72,6 +72,11 @@ class ExtensionError(SphinxError):
         return parent_str
 
 
+class BuildEnvironmentError(SphinxError):
+    """BuildEnvironment error."""
+    category = 'BuildEnvironment error'
+
+
 class ConfigError(SphinxError):
     """Configuration error."""
     category = 'Configuration error'