diff --git a/Reporting/ReportParameters.cs b/Reporting/ReportParameters.cs
index 8eabead2c..120920787 100644
--- a/Reporting/ReportParameters.cs
+++ b/Reporting/ReportParameters.cs
@@ -12,7 +12,7 @@ protected ReportParameters(string projectFile, string outputFile, string xsltFil
         {
             this.ProjectFile = projectFile;
             this.OutputFile = Path.GetFullPath(outputFile);
-            this.XsltFile = Path.GetFullPath(xsltFile);
+            this.XsltFile = string.IsNullOrEmpty(xsltFile) ? "" : Path.GetFullPath(xsltFile);
         }
     }
 }
\ No newline at end of file