diff --git a/basis/compiler/tests/linkage-errors.factor b/basis/compiler/tests/linkage-errors.factor
index fc59f6552e..94c0a1d5aa 100644
--- a/basis/compiler/tests/linkage-errors.factor
+++ b/basis/compiler/tests/linkage-errors.factor
@@ -1,5 +1,5 @@
 USING: tools.test namespaces assocs alien.syntax kernel
-compiler.errors accessors alien ;
+compiler.errors accessors alien alien.c-types ;
 FROM: alien.libraries => add-library ;
 IN: compiler.tests.linkage-errors
 
diff --git a/basis/compiler/tests/optimizer.factor b/basis/compiler/tests/optimizer.factor
index e07fdd9824..c3fd37c48a 100644
--- a/basis/compiler/tests/optimizer.factor
+++ b/basis/compiler/tests/optimizer.factor
@@ -5,7 +5,8 @@ quotations classes classes.algebra classes.tuple.private
 continuations growable namespaces hints alien.accessors
 compiler.tree.builder compiler.tree.optimizer sequences.deep
 compiler.test definitions generic.single shuffle math.order
-compiler.cfg.debugger classes.struct alien.syntax alien.data ;
+compiler.cfg.debugger classes.struct alien.syntax alien.data
+alien.c-types ;
 IN: compiler.tests.optimizer
 
 GENERIC: xyz ( obj -- obj )