diff --git a/qutebrowser/browser/commands.py b/qutebrowser/browser/commands.py
index a06fc9361..4be7ed583 100644
--- a/qutebrowser/browser/commands.py
+++ b/qutebrowser/browser/commands.py
@@ -1122,7 +1122,7 @@ class CommandDispatcher:
         try:
             userscripts.run_async(tab, cmd, *args, win_id=self._win_id,
                                   env=env, verbose=verbose)
-        except (userscripts.UnsupportedError, userscripts.NotFoundError) as e:
+        except userscripts.Error as e:
             raise cmdexc.CommandError(e)
 
     @cmdutils.register(instance='command-dispatcher', scope='window')
diff --git a/qutebrowser/commands/userscripts.py b/qutebrowser/commands/userscripts.py
index 34898ad52..2d9fb1dd1 100644
--- a/qutebrowser/commands/userscripts.py
+++ b/qutebrowser/commands/userscripts.py
@@ -315,7 +315,12 @@ class _WindowsUserscriptRunner(_BaseUserscriptRunner):
             return
 
 
-class NotFoundError(Exception):
+class Error(Exception):
+
+    """Base class for userscript exceptions."""
+
+
+class NotFoundError(Error):
 
     """Raised when spawning a userscript that doesn't exist.
 
@@ -338,7 +343,7 @@ class NotFoundError(Exception):
         return self.message
 
 
-class UnsupportedError(Exception):
+class UnsupportedError(Error):
 
     """Raised when userscripts aren't supported on this platform."""