diff --git a/removed/random/sfmt/authors.txt b/extra/random/sfmt/authors.txt
similarity index 100%
rename from removed/random/sfmt/authors.txt
rename to extra/random/sfmt/authors.txt
diff --git a/removed/random/sfmt/sfmt-tests.factor b/extra/random/sfmt/sfmt-tests.factor
similarity index 100%
rename from removed/random/sfmt/sfmt-tests.factor
rename to extra/random/sfmt/sfmt-tests.factor
diff --git a/removed/random/sfmt/sfmt.factor b/extra/random/sfmt/sfmt.factor
similarity index 100%
rename from removed/random/sfmt/sfmt.factor
rename to extra/random/sfmt/sfmt.factor