diff --git a/core/generic/single/single-tests.factor b/core/generic/single/single-tests.factor
index 554e287a3b..0f6c9bc0cd 100644
--- a/core/generic/single/single-tests.factor
+++ b/core/generic/single/single-tests.factor
@@ -4,7 +4,8 @@ accessors words byte-arrays bit-arrays parser namespaces make
 quotations stack-checker vectors growable hashtables sbufs
 prettyprint byte-vectors bit-vectors specialized-vectors
 definitions generic sets graphs assocs grouping see eval ;
-SPECIALIZED-VECTOR: double
+QUALIFIED-WITH: alien.c-types c
+SPECIALIZED-VECTOR: c:double
 IN: generic.single.tests
 
 GENERIC: lo-tag-test ( obj -- obj' )
diff --git a/extra/cpu/8080/emulator/emulator.factor b/extra/cpu/8080/emulator/emulator.factor
index 04c47caf4a..ddea7e762a 100755
--- a/extra/cpu/8080/emulator/emulator.factor
+++ b/extra/cpu/8080/emulator/emulator.factor
@@ -24,7 +24,6 @@ USING:
     quotations
     sequences
     sequences.deep
-    syntax
     words
 ;
 IN: cpu.8080.emulator
diff --git a/extra/space-invaders/space-invaders.factor b/extra/space-invaders/space-invaders.factor
index cb0f4319d6..cbe2241604 100755
--- a/extra/space-invaders/space-invaders.factor
+++ b/extra/space-invaders/space-invaders.factor
@@ -22,15 +22,13 @@ USING:
     ui.gadgets
     ui.gestures
     ui.render
+    specialized-arrays
 ;
 QUALIFIED: threads
 QUALIFIED: system
+SPECIALIZED-ARRAY: uchar
 IN: space-invaders
 
-<< 
-    "uchar" require-c-array 
->>
-
 TUPLE: space-invaders < cpu port1 port2i port2o port3o port4lo port4hi port5o bitmap sounds looping? ;
 CONSTANT: game-width 224
 CONSTANT: game-height 256