diff --git a/flutter/lib/models/model.dart b/flutter/lib/models/model.dart
index 802a18a52..a8ed56bc5 100644
--- a/flutter/lib/models/model.dart
+++ b/flutter/lib/models/model.dart
@@ -371,7 +371,11 @@ class FfiModel with ChangeNotifier {
 
   _updateSessionWidthHeight(String id) {
     parent.target?.canvasModel.updateViewStyle();
-    bind.sessionSetSize(id: id, width: display.width, height: display.height);
+    if (display.width < 0 || display.height < 0) {
+      debugPrintStack(label: 'invalid display size (${display.width},${display.height})');
+    } else {
+      bind.sessionSetSize(id: id, width: display.width, height: display.height);
+    }
   }
 
   /// Handle the peer info event based on [evt].