1 files changed, 3 insertions, 0 deletions
diff --git a/sysdata.go b/sysdata.go
index 4574684..eb62107 100644
--- a/sysdata.go
+++ b/sysdata.go
@@ -67,6 +67,9 @@ func (c *cSysData) preferredSize() (int, int) {
 func (c *cSysData) setProgress(int) {
 	panic(runtime.GOOS + " sysData does not define setProgress()")
 }
+func (c *cSysData) len() int {
+	panic(runtime.GOOS + " sysData does not define len()")
+}
 
 // signal sends the event signal. This raise is done asynchronously to avoid deadlocking the UI task.
 // Thanks skelterjohn for this techinque: if we can't queue any more events, drop them