1 files changed, 1 insertions, 1 deletions

diff --git a/src/WixToolset.Core/Compiler.cs b/src/WixToolset.Core/Compiler.cs
index 179c5a37..2a020ad5 100644
--- a/src/WixToolset.Core/Compiler.cs
+++ b/src/WixToolset.Core/Compiler.cs
@@ -7299,7 +7299,7 @@ namespace WixToolset.Core
                 }
             }
 
-            if (!compressionLevel.HasValue && null == cabinet)
+            if (compressionLevel.HasValue && String.IsNullOrEmpty(cabinet))
             {
                 this.Core.Write(ErrorMessages.ExpectedAttribute(sourceLineNumbers, node.Name.LocalName, "Cabinet", "CompressionLevel"));
             }