diff --git a/Htmldocs/release_notes.html b/Htmldocs/release_notes.html
index ce99f820..ae7009f9 100644
--- a/Htmldocs/release_notes.html
+++ b/Htmldocs/release_notes.html
@@ -21,6 +21,7 @@
           <li>DreamStation 2 Auto CPAP Advanced (520X130C)</li>
           <li>BiPAP Auto (System One 60 Series) (761P)</li>
           <li>BiPAP autoSV Advanced 30 (System One 60 Series) (961TCA)</li>
+          <li>REMstar Auto (System One) (552P)</li>
         </ul>
       </li>
       <li>[fix] Added support for pressure pulse, CA, and VS on BiPAP autoSV Advanced 30 (System One 60 Series) (960T).</li>
diff --git a/oscar/SleepLib/loader_plugins/prs1_loader.cpp b/oscar/SleepLib/loader_plugins/prs1_loader.cpp
index 002d4315..b0e28ba5 100644
--- a/oscar/SleepLib/loader_plugins/prs1_loader.cpp
+++ b/oscar/SleepLib/loader_plugins/prs1_loader.cpp
@@ -88,6 +88,7 @@ static const PRS1TestedModel s_PRS1TestedModels[] = {
     { "550P", 0, 2, "REMstar Auto (System One)" },
     { "550P", 0, 3, "REMstar Auto (System One)" },
     { "551P", 0, 2, "REMstar Auto (System One)" },
+    { "552P", 0, 3, "REMstar Auto (System One)" },
     { "650P", 0, 2, "BiPAP Pro (System One)" },
     { "750P", 0, 2, "BiPAP Auto (System One)" },