diff --git a/basis/compiler/constants/constants-docs.factor b/basis/compiler/constants/constants-docs.factor
index 4f41da98a4..287f8adf06 100644
--- a/basis/compiler/constants/constants-docs.factor
+++ b/basis/compiler/constants/constants-docs.factor
@@ -24,7 +24,6 @@ $nl
 { $subsections card-bits card-mark deck-bits }
 "Constants that must match vm/layouts.hpp:"
 { $subsections
-  profile-count-offset
   slot-offset
 }
 "Offsets to fields in the context struct:"
@@ -39,7 +38,6 @@ $nl
 "Offsets to field in the segment struct:"
 { $subsections
   segment-end-offset
-  segment-size-offset
   segment-start-offset
 }
 "Offsets to fields in the vm struct:"
@@ -58,10 +56,8 @@ $nl
   callstack-top-offset
   float-offset
   quot-entry-point-offset
-  string-aux-offset
   string-offset
   tuple-class-offset
-  underlying-alien-offset
   word-entry-point-offset
 } ;
 
diff --git a/basis/compiler/constants/constants.factor b/basis/compiler/constants/constants.factor
index 80aafc609a..33cfba2e7a 100644
--- a/basis/compiler/constants/constants.factor
+++ b/basis/compiler/constants/constants.factor
@@ -12,11 +12,8 @@ CONSTANT: deck-bits 18
 
 : float-offset ( -- n ) 8 float type-number - ; inline
 : string-offset ( -- n ) 4 string type-number slot-offset ; inline
-: string-aux-offset ( -- n ) 2 string type-number slot-offset ; inline
-: profile-count-offset ( -- n ) 8 \ word type-number slot-offset ; inline
 : byte-array-offset ( -- n ) 16 byte-array type-number - ; inline
 : alien-offset ( -- n ) 4 alien type-number slot-offset ; inline
-: underlying-alien-offset ( -- n ) 1 alien type-number slot-offset ; inline
 : tuple-class-offset ( -- n ) 1 tuple type-number slot-offset ; inline
 : word-entry-point-offset ( -- n ) 9 \ word type-number slot-offset ; inline
 : quot-entry-point-offset ( -- n ) 4 quotation type-number slot-offset ; inline
@@ -34,7 +31,6 @@ CONSTANT: deck-bits 18
 : context-callstack-save-offset ( -- n ) 4 bootstrap-cells ; inline
 : context-callstack-seg-offset ( -- n ) 7 bootstrap-cells ; inline
 : segment-start-offset ( -- n ) 0 bootstrap-cells ; inline
-: segment-size-offset ( -- n ) 1 bootstrap-cells ; inline
 : segment-end-offset ( -- n ) 2 bootstrap-cells ; inline
 
 ! Relocation classes
@@ -45,9 +41,6 @@ CONSTANT: rc-absolute-ppc-2/2 3
 CONSTANT: rc-absolute-ppc-2 4
 CONSTANT: rc-relative-ppc-2-pc 5
 CONSTANT: rc-relative-ppc-3-pc 6
-CONSTANT: rc-relative-arm-3 7
-CONSTANT: rc-indirect-arm 8
-CONSTANT: rc-indirect-arm-pc 9
 CONSTANT: rc-absolute-2 10
 CONSTANT: rc-absolute-1 11
 CONSTANT: rc-absolute-ppc-2/2/2/2 12