diff --git a/Assets/Samples/VideoClassification/VideoClassification.cs b/Assets/Samples/VideoClassification/VideoClassification.cs
index ad6969f24..1ce4f3c8f 100644
--- a/Assets/Samples/VideoClassification/VideoClassification.cs
+++ b/Assets/Samples/VideoClassification/VideoClassification.cs
@@ -57,6 +57,7 @@ public VideoClassification(Options options)
             try
             {
                 runner = new SignatureRunner(SIGNATURE_KEY, FileUtil.LoadFile(options.modelPath), interpreterOptions);
+                runner.AllocateSignatureTensors();
             }
             catch (Exception e)
             {