diff --git a/src/SharpCompress/Compressors/Rar/UnpackV1/Unpack.cs b/src/SharpCompress/Compressors/Rar/UnpackV1/Unpack.cs
index c62d5906..732c57e8 100644
--- a/src/SharpCompress/Compressors/Rar/UnpackV1/Unpack.cs
+++ b/src/SharpCompress/Compressors/Rar/UnpackV1/Unpack.cs
@@ -263,7 +263,7 @@ internal sealed partial class Unpack : BitInput, IRarUnpack, IDisposable
             if (((wrPtr - unpPtr) & PackDef.MAXWINMASK) < 260 && wrPtr != unpPtr)
             {
                 UnpWriteBuf();
-                if (destUnpSize <= 0)
+                if (destUnpSize < 0)
                 {
                     return;
                 }
@@ -713,7 +713,7 @@ internal sealed partial class Unpack : BitInput, IRarUnpack, IDisposable
 
     private void UnpWriteData(byte[] data, int offset, int size)
     {
-        if (destUnpSize <= 0)
+        if (destUnpSize < 0)
         {
             return;
         }