diff --git a/core/cpu/ppc/bootstrap.factor b/core/cpu/ppc/bootstrap.factor
index 705ddac06d..49955d9f38 100755
--- a/core/cpu/ppc/bootstrap.factor
+++ b/core/cpu/ppc/bootstrap.factor
@@ -14,13 +14,13 @@ big-endian on
 : ds-reg 14 ;
 : rs-reg 15 ;
 
-: factor-area-size 4 bootstrap-cells ;
+: factor-area-size ( -- n ) 4 bootstrap-cells ;
 
-: stack-frame
+: stack-frame ( -- n )
     factor-area-size c-area-size + 4 bootstrap-cells align ;
 
-: next-save stack-frame bootstrap-cell - ;
-: xt-save stack-frame 2 bootstrap-cells - ;
+: next-save ( -- n ) stack-frame bootstrap-cell - ;
+: xt-save ( -- n ) stack-frame 2 bootstrap-cells - ;
 
 [
     0 6 LOAD32
diff --git a/core/cpu/ppc/linux/bootstrap.factor b/core/cpu/ppc/linux/bootstrap.factor
index 3900ca7f88..e0f8bf0b21 100755
--- a/core/cpu/ppc/linux/bootstrap.factor
+++ b/core/cpu/ppc/linux/bootstrap.factor
@@ -3,8 +3,8 @@
 USING: parser layouts system kernel ;
 IN: bootstrap.ppc
 
-: c-area-size 10 bootstrap-cells ;
-: lr-save bootstrap-cell ;
+: c-area-size ( -- n ) 10 bootstrap-cells ;
+: lr-save ( -- n ) bootstrap-cell ;
 
 << "resource:core/cpu/ppc/bootstrap.factor" parse-file parsed >>
 call
diff --git a/core/cpu/ppc/macosx/bootstrap.factor b/core/cpu/ppc/macosx/bootstrap.factor
index db5e3a343f..06b02d3182 100755
--- a/core/cpu/ppc/macosx/bootstrap.factor
+++ b/core/cpu/ppc/macosx/bootstrap.factor
@@ -3,8 +3,8 @@
 USING: parser layouts system kernel ;
 IN: bootstrap.ppc
 
-: c-area-size 14 bootstrap-cells ;
-: lr-save 2 bootstrap-cells ;
+: c-area-size ( -- n ) 14 bootstrap-cells ;
+: lr-save ( -- n ) 2 bootstrap-cells ;
 
 << "resource:core/cpu/ppc/bootstrap.factor" parse-file parsed >>
 call