diff --git a/datasette/app.py b/datasette/app.py
index 001cf4c3..1c5d6a37 100644
--- a/datasette/app.py
+++ b/datasette/app.py
@@ -1638,9 +1638,7 @@ class Datasette:
         results = await db.execute(sql, params, truncate=True)
         row = results.first()
         if row is None:
-            raise RowNotFound(
-                "Row not found: {}".format(pk_values), db.name, table_name, pk_values
-            )
+            raise RowNotFound(db.name, table_name, pk_values)
         return ResolvedRow(db, table_name, sql, params, pks, pk_values, results.first())
 
     def app(self):
diff --git a/datasette/utils/asgi.py b/datasette/utils/asgi.py
index 6bdba714..1699847e 100644
--- a/datasette/utils/asgi.py
+++ b/datasette/utils/asgi.py
@@ -36,8 +36,8 @@ class TableNotFound(NotFound):
 
 
 class RowNotFound(NotFound):
-    def __init__(self, message, database_name, table, pk_values):
-        super().__init__(message)
+    def __init__(self, database_name, table, pk_values):
+        super().__init__("Row not found")
         self.database_name = database_name
         self.table_name = table
         self.pk_values = pk_values