diff --git a/src/vmsrc/plvm01.s b/src/vmsrc/plvm01.s
index 6736daf..31c685f 100644
--- a/src/vmsrc/plvm01.s
+++ b/src/vmsrc/plvm01.s
@@ -226,7 +226,7 @@ SUB 	LDA	ESTKL+1,X
 	JMP	NEXTOP
 ;
 ;*
-;* SHIFT TOS-1 LEFT BY 1, ADD TO TOS-1
+;* SHIFT TOS LEFT BY 1, ADD TO TOS-1
 ;*
 IDXW 	LDA	ESTKL,X
 	ASL
diff --git a/src/vmsrc/plvm02.s b/src/vmsrc/plvm02.s
index 31bdbd4..a4f567b 100644
--- a/src/vmsrc/plvm02.s
+++ b/src/vmsrc/plvm02.s
@@ -419,7 +419,7 @@ SUB 	LDA	ESTKL+1,X
 	INX
 	JMP	NEXTOP
 ;*
-;* SHIFT TOS-1 LEFT BY 1, ADD TO TOS-1
+;* SHIFT TOS LEFT BY 1, ADD TO TOS-1
 ;*
 IDXW 	LDA	ESTKL,X
 	ASL
diff --git a/src/vmsrc/plvm03.s b/src/vmsrc/plvm03.s
index 09c171c..bdd3425 100644
--- a/src/vmsrc/plvm03.s
+++ b/src/vmsrc/plvm03.s
@@ -308,7 +308,7 @@ SUB 	LDA	ESTKL+1,X
 	JMP	NEXTOP
 ;
 ;*
-;* SHIFT TOS-1 LEFT BY 1, ADD TO TOS-1
+;* SHIFT TOS LEFT BY 1, ADD TO TOS-1
 ;*
 IDXW 	LDA	ESTKL,X
 	ASL