1 files changed, 1 insertions, 1 deletions

diff --git a/src/WixToolset.Core/ExtensibilityServices/PreprocessHelper.cs b/src/WixToolset.Core/ExtensibilityServices/PreprocessHelper.cs
index 0e4bba51..562f094f 100644
--- a/src/WixToolset.Core/ExtensibilityServices/PreprocessHelper.cs
+++ b/src/WixToolset.Core/ExtensibilityServices/PreprocessHelper.cs
@@ -45,7 +45,7 @@ namespace WixToolset.Core.ExtensibilityServices
             }
             else
             {
-                if (showWarning)
+                if (showWarning && value != currentValue)
                 {
                     this.Messaging.Write(WarningMessages.VariableDeclarationCollision(context.CurrentSourceLineNumber, name, value, currentValue));
                 }