diff --git a/tools/Invoke-Preprocessing.ps1 b/tools/Invoke-Preprocessing.ps1
index 092799d2..85458480 100644
--- a/tools/Invoke-Preprocessing.ps1
+++ b/tools/Invoke-Preprocessing.ps1
@@ -164,7 +164,7 @@
             -replace ('\}\s*Catch', '} catch') `
             -replace ('\}\s*Catch\s*(?<exceptions>(\[.*?\]\s*(\,)?\s*)+)\s*\{', '} catch ${exceptions} {') `
             -replace ('\}\s*Catch\s*(?<exceptions>\[.*?\])\s*\{', '} catch ${exceptions} {') `
-            -replace ('(?<parameter_type>\[.*?\])\s*(?<str_after_type>\$.*?(,|\s*\)))', '${parameter_type}${str_after_type}') `
+            -replace ('(?<parameter_type>\[[^$]+\])\s*(?<str_after_type>\$.*?)', '${parameter_type}${str_after_type}') `
         | Set-Content "$fullFileName"
 
         Write-Progress -Activity $ProgressActivity -Status "$ProgressStatusMessage - Finished $i out of $numOfFiles" -PercentComplete (($i/$numOfFiles)*100)