diff --git a/basis/cpu/ppc/ppc.factor b/basis/cpu/ppc/ppc.factor
index beee48e5ea..5a528ddd5a 100644
--- a/basis/cpu/ppc/ppc.factor
+++ b/basis/cpu/ppc/ppc.factor
@@ -713,3 +713,4 @@ USE: vocabs.loader
 } cond
 
 "complex-double" c-type t >>return-in-registers? drop
+"bool" c-type 4 >>size 4 >>align drop
\ No newline at end of file