diff --git a/demos/cube.c b/demos/cube.c
index 6637bce..b1c4c6f 100644
--- a/demos/cube.c
+++ b/demos/cube.c
@@ -1944,6 +1944,9 @@
     case WM_PAINT:
         demo_run(&demo);
         break;
+    case WM_SIZE:
+        demo_resize(&demo);
+        break;
     default:
         break;
     }
diff --git a/demos/tri.c b/demos/tri.c
index fa99549..9b512ae 100644
--- a/demos/tri.c
+++ b/demos/tri.c
@@ -1569,6 +1569,9 @@
             demo_run(&demo);
             break;
         }
+    case WM_SIZE:
+        demo_resize(&demo);
+        break;
     default:
         break;
     }