diff --git a/extra/project-euler/049/049.factor b/extra/project-euler/049/049.factor
index 08244ea023..dac34da9ff 100644
--- a/extra/project-euler/049/049.factor
+++ b/extra/project-euler/049/049.factor
@@ -2,6 +2,7 @@
 ! See http://factorcode.org/license.txt for BSD license.
 USING: arrays byte-arrays fry kernel math math.combinatorics math.functions
     math.parser math.primes project-euler.common sequences sets ;
+FROM: project-euler.common => permutations? ;
 IN: project-euler.049
 
 ! http://projecteuler.net/index.php?section=problems&id=49
diff --git a/extra/project-euler/070/070.factor b/extra/project-euler/070/070.factor
index eed179851e..38aa022b3d 100644
--- a/extra/project-euler/070/070.factor
+++ b/extra/project-euler/070/070.factor
@@ -3,6 +3,7 @@
 ! A copy of the license is available at http://factorcode.org/license.txt
 USING: arrays assocs combinators.short-circuit kernel math math.combinatorics
     math.functions math.primes math.ranges project-euler.common sequences ;
+FROM: project-euler.common => permutations? ;
 IN: project-euler.070
 
 ! http://projecteuler.net/index.php?section=problems&id=70