diff --git a/src/NerdBank.GitVersioning/ManagedGit/DeltaStreamReader.cs b/src/NerdBank.GitVersioning/ManagedGit/DeltaStreamReader.cs
index 08ee301e..a23020a9 100644
--- a/src/NerdBank.GitVersioning/ManagedGit/DeltaStreamReader.cs
+++ b/src/NerdBank.GitVersioning/ManagedGit/DeltaStreamReader.cs
@@ -84,6 +84,12 @@ public static class DeltaStreamReader
                 {
                     value.Size |= ((byte)stream.ReadByte() << 16);
                 }
+
+                // Size zero is automatically converted to 0x10000.
+                if (value.Size == 0)
+                {
+                    value.Size = 0x10000;
+                }
             }
 
             return value;