1 files changed, 1 insertions, 1 deletions

diff --git a/src/WixToolset.Core/Extensibility/MutatorExtension.cs b/src/WixToolset.Core/Extensibility/MutatorExtension.cs
index f95b5b11..afc76b79 100644
--- a/src/WixToolset.Core/Extensibility/MutatorExtension.cs
+++ b/src/WixToolset.Core/Extensibility/MutatorExtension.cs
@@ -151,7 +151,7 @@ namespace WixToolset.Core.Extensibility
                     }
                 }
 
-                throw new InvalidOperationException(WixStrings.EXP_CouldnotFileUniqueIDForResourceName);
+                throw new InvalidOperationException("Could not find a unique identifier for the given resource name.");
             }
 
             /// <summary>