diff --git a/dali/base/dadfs.cpp b/dali/base/dadfs.cpp
index fe390b2aa2c..5841df604f8 100644
--- a/dali/base/dadfs.cpp
+++ b/dali/base/dadfs.cpp
@@ -13811,10 +13811,13 @@ static bool doesPhysicalMatchMeta(IPropertyTree &partProps, IFile &iFile, offset
 {
     // NB: temporary workaround for 'narrow' files publishing extra empty parts with the wrong @compressedSize(0)
     // causing a new check introduced in HPCC-33064 to be hit (fixed in HPCC-33113, but will continue to affect exiting files)
-    unsigned __int64 size = partProps.getPropInt64("@size", (unsigned __int64)-1);
-    unsigned __int64 compressedSize = partProps.getPropInt64("@compressedSize", (unsigned __int64)-1);
+    unsigned __int64 size = partProps.getPropInt64("@size", unknownFileSize);
+    unsigned __int64 compressedSize = partProps.getPropInt64("@compressedSize", unknownFileSize);
     if ((0 == size) && (0 == compressedSize))
+    {
+        actualSize = unknownFileSize;
         return true;
+    }
 
     if (expectedSize != unknownFileSize)
     {
@@ -13822,6 +13825,9 @@ static bool doesPhysicalMatchMeta(IPropertyTree &partProps, IFile &iFile, offset
         if (actualSize != expectedSize)
             return false;
     }
+    else
+        actualSize = unknownFileSize;
+
     return true;
 }