diff --git a/main.go b/main.go
index cec432d..5f77a19 100644
--- a/main.go
+++ b/main.go
@@ -756,6 +756,10 @@ func (f *TMainForm) OnQueryExecute(sender vcl.IObject) {
 		queryString = f.queryInput.SelText() // Just the selected text
 	}
 
+	if strings.TrimSpace(queryString) == "" {
+		return // prevent blank query
+	}
+
 	// Execute
 	node := f.Buckets.Selected()
 	if node == nil {