diff --git a/cs/src/core/Allocator/GenericAllocator.cs b/cs/src/core/Allocator/GenericAllocator.cs
index 73e7a3029..95e6e9a92 100644
--- a/cs/src/core/Allocator/GenericAllocator.cs
+++ b/cs/src/core/Allocator/GenericAllocator.cs
@@ -883,6 +883,9 @@ protected override bool RetrievedFullRecord(byte* record, ref AsyncIOContext<Key
                 if (endAddress-startAddress > int.MaxValue)
                     throw new FasterException("Size of key-value exceeds max of 2GB: " + (endAddress - startAddress));
 
+                if (startAddress < 0)
+                    startAddress = 0;
+
                 AsyncGetFromDisk(startAddress, (int)(endAddress - startAddress), ctx, ctx.record);
                 return false;
             }