diff --git a/basis/cpu/x86/32/bootstrap.factor b/basis/cpu/x86/32/bootstrap.factor
index e2096987da..0540ccd6d6 100644
--- a/basis/cpu/x86/32/bootstrap.factor
+++ b/basis/cpu/x86/32/bootstrap.factor
@@ -11,7 +11,7 @@ IN: bootstrap.x86
 : shift-arg ( -- reg ) ECX ;
 : div-arg ( -- reg ) EAX ;
 : mod-arg ( -- reg ) EDX ;
-: arg ( -- reg ) EAX ;
+: arg1 ( -- reg ) EAX ;
 : arg2 ( -- reg ) EDX ;
 : temp0 ( -- reg ) EAX ;
 : temp1 ( -- reg ) EDX ;
@@ -29,7 +29,7 @@ IN: bootstrap.x86
     ! save stack pointer
     temp0 [] stack-reg MOV
     ! pass vm ptr to primitive
-    arg 0 MOV rc-absolute-cell rt-vm jit-rel
+    arg1 0 MOV rc-absolute-cell rt-vm jit-rel
     ! call the primitive
     0 JMP rc-relative rt-primitive jit-rel
 ] jit-primitive jit-define
diff --git a/basis/cpu/x86/64/bootstrap.factor b/basis/cpu/x86/64/bootstrap.factor
index ff6c241970..bffe056656 100644
--- a/basis/cpu/x86/64/bootstrap.factor
+++ b/basis/cpu/x86/64/bootstrap.factor
@@ -29,7 +29,7 @@ IN: bootstrap.x86
     ! load XT
     temp1 0 MOV rc-absolute-cell rt-primitive jit-rel
     ! load vm ptr
-    arg 0 MOV rc-absolute-cell rt-vm jit-rel
+    arg1 0 MOV rc-absolute-cell rt-vm jit-rel
     ! go
     temp1 JMP
 ] jit-primitive jit-define
diff --git a/basis/cpu/x86/64/unix/bootstrap.factor b/basis/cpu/x86/64/unix/bootstrap.factor
index 199fe8daf4..2ad3a721af 100644
--- a/basis/cpu/x86/64/unix/bootstrap.factor
+++ b/basis/cpu/x86/64/unix/bootstrap.factor
@@ -5,7 +5,7 @@ cpu.x86.assembler cpu.x86.assembler.operands layouts vocabs parser ;
 IN: bootstrap.x86
 
 : stack-frame-size ( -- n ) 4 bootstrap-cells ;
-: arg ( -- reg ) RDI ;
+: arg1 ( -- reg ) RDI ;
 : arg2 ( -- reg ) RSI ;
 
 << "vocab:cpu/x86/64/bootstrap.factor" parse-file parsed >>
diff --git a/basis/cpu/x86/64/winnt/bootstrap.factor b/basis/cpu/x86/64/winnt/bootstrap.factor
index 72b9d27ca4..2dd3e889a5 100644
--- a/basis/cpu/x86/64/winnt/bootstrap.factor
+++ b/basis/cpu/x86/64/winnt/bootstrap.factor
@@ -6,7 +6,7 @@ cpu.x86.assembler.operands ;
 IN: bootstrap.x86
 
 : stack-frame-size ( -- n ) 8 bootstrap-cells ;
-: arg ( -- reg ) RCX ;
+: arg1 ( -- reg ) RCX ;
 : arg2 ( -- reg ) RDX ;
 
 << "vocab:cpu/x86/64/bootstrap.factor" parse-file parsed >>
diff --git a/basis/cpu/x86/bootstrap.factor b/basis/cpu/x86/bootstrap.factor
index 5bc5272ab4..3cc71d22f7 100644
--- a/basis/cpu/x86/bootstrap.factor
+++ b/basis/cpu/x86/bootstrap.factor
@@ -248,13 +248,13 @@ big-endian off
 ! Quotations and words
 [
     ! load from stack
-    arg ds-reg [] MOV
+    arg1 ds-reg [] MOV
     ! pop stack
     ds-reg bootstrap-cell SUB
     ! pass vm pointer
     arg2 0 MOV rc-absolute-cell rt-vm jit-rel
     ! call quotation
-    arg quot-xt-offset [+] JMP
+    arg1 quot-xt-offset [+] JMP
 ] \ (call) define-sub-primitive
 
 ! Objects