diff --git a/tools/releaseTools.psm1 b/tools/releaseTools.psm1
index e7d2386a47c..d67e76c1a53 100644
--- a/tools/releaseTools.psm1
+++ b/tools/releaseTools.psm1
@@ -361,7 +361,7 @@ function PrintChangeLog($clSection, $sectionTitle, [switch] $Compress) {
         if ($Compress) {
             $items = $clSection.ChangeLogMessage -join "`n"
             $thankYou = "We thank the following contributors!`n`n"
-            $thankYou += ($clSection.ThankYouMessage | Where-Object { if($_) { return $true} return $false}) -join ", "
+            $thankYou += ($clSection.ThankYouMessage | Select-Object -Unique | Where-Object { if($_) { return $true} return $false}) -join ", "
 
             "<details>`n"
             "<summary>`n"