diff --git a/hm/desktop/frobar/frobar/providers.py b/hm/desktop/frobar/frobar/providers.py
index 7e896c5..00554d1 100644
--- a/hm/desktop/frobar/frobar/providers.py
+++ b/hm/desktop/frobar/frobar/providers.py
@@ -19,7 +19,7 @@ from frobar.common import (AlertingProvider, Button, MirrorProvider, Module,
                            MultiSectionsProvider, PeriodicProvider,
                            PeriodicStatefulProvider, Screen, Section,
                            SingleSectionProvider, StatefulSection,
-                           StatefulSectionProvider, clip, humanSize, ramp)
+                           StatefulSectionProvider, clip, humanSize, log, ramp)
 
 gi.require_version("Playerctl", "2.0")
 import gi.repository.Playerctl
@@ -81,7 +81,12 @@ class I3WorkspacesProvider(MultiSectionsProvider):
         section.setAction(Button.CLICK_LEFT, switch_to_workspace)
 
         async def update() -> None:
-            workspace = self.workspaces[num]
+            workspace = self.workspaces.get(num)
+            if workspace is None:
+                log.warning(f"Can't find workspace {num}")
+                section.setText("X")
+                return
+
             name = workspace.name
             if workspace.urgent:
                 section.color = self.COLOR_URGENT