diff --git a/basis/io/monitors/linux/linux.factor b/basis/io/monitors/linux/linux.factor
index 63484f467f..31442b7f0b 100644
--- a/basis/io/monitors/linux/linux.factor
+++ b/basis/io/monitors/linux/linux.factor
@@ -6,6 +6,7 @@ io.backend.unix io.encodings.utf8 unix.linux.inotify assocs
 namespaces make threads continuations init math math.bitwise
 sets alien alien.strings alien.c-types vocabs.loader accessors
 system hashtables destructors unix classes.struct ;
+FROM: namespaces => set ;
 IN: io.monitors.linux
 
 SYMBOL: watches
diff --git a/basis/ui/backend/windows/windows.factor b/basis/ui/backend/windows/windows.factor
index 0bf2e88468..8a4ae9853f 100644
--- a/basis/ui/backend/windows/windows.factor
+++ b/basis/ui/backend/windows/windows.factor
@@ -14,6 +14,7 @@ math.order calendar ascii sets io.encodings.utf16n
 windows.errors literals ui.pixel-formats
 ui.pixel-formats.private memoize classes colors
 specialized-arrays classes.struct alien.data ;
+FROM: namespaces => set ;
 SPECIALIZED-ARRAY: POINT
 IN: ui.backend.windows