1 files changed, 1 insertions, 1 deletions

diff --git a/src/WixToolset.Core/Compiler.cs b/src/WixToolset.Core/Compiler.cs
index 56d3a8b4..179c5a37 100644
--- a/src/WixToolset.Core/Compiler.cs
+++ b/src/WixToolset.Core/Compiler.cs
@@ -5203,7 +5203,7 @@ namespace WixToolset.Core
                 this.Core.Write(ErrorMessages.ExpectedAttribute(sourceLineNumbers, node.Name.LocalName, "Name"));
             }
 
-            if (!part.HasValue && action == EnvironmentActionType.Create)
+            if (part.HasValue && action == EnvironmentActionType.Create)
             {
                 this.Core.Write(ErrorMessages.IllegalAttributeWithOtherAttribute(sourceLineNumbers, node.Name.LocalName, "Part", "Action", "create"));
             }