diff --git a/basis/assoc-heaps/assoc-heaps-docs.factor b/extra/assoc-heaps/assoc-heaps-docs.factor
similarity index 100%
rename from basis/assoc-heaps/assoc-heaps-docs.factor
rename to extra/assoc-heaps/assoc-heaps-docs.factor
diff --git a/basis/assoc-heaps/assoc-heaps-tests.factor b/extra/assoc-heaps/assoc-heaps-tests.factor
similarity index 100%
rename from basis/assoc-heaps/assoc-heaps-tests.factor
rename to extra/assoc-heaps/assoc-heaps-tests.factor
diff --git a/basis/assoc-heaps/assoc-heaps.factor b/extra/assoc-heaps/assoc-heaps.factor
similarity index 100%
rename from basis/assoc-heaps/assoc-heaps.factor
rename to extra/assoc-heaps/assoc-heaps.factor
diff --git a/basis/assoc-heaps/authors.txt b/extra/assoc-heaps/authors.txt
similarity index 100%
rename from basis/assoc-heaps/authors.txt
rename to extra/assoc-heaps/authors.txt
diff --git a/basis/assoc-heaps/summary.txt b/extra/assoc-heaps/summary.txt
similarity index 100%
rename from basis/assoc-heaps/summary.txt
rename to extra/assoc-heaps/summary.txt