diff --git a/extra/project-euler/project-euler.factor b/extra/project-euler/project-euler.factor
index 250a92b953..0be847623e 100644
--- a/extra/project-euler/project-euler.factor
+++ b/extra/project-euler/project-euler.factor
@@ -7,7 +7,8 @@ USING: definitions io io.files kernel math.parser sequences vocabs
     project-euler.009 project-euler.010 project-euler.011 project-euler.012
     project-euler.013 project-euler.014 project-euler.015 project-euler.016
     project-euler.017 project-euler.018 project-euler.019 project-euler.020
-    project-euler.021 project-euler.022 project-euler.067 project-euler.134 ;
+    project-euler.021 project-euler.022 project-euler.067 project-euler.134
+    project-euler.169 project-euler.173 project-euler.175 ;
 IN: project-euler
 
 <PRIVATE