diff --git a/libsrc/common/strlower.s b/libsrc/common/strlower.s
index b76133ce7..28214b990 100644
--- a/libsrc/common/strlower.s
+++ b/libsrc/common/strlower.s
@@ -19,7 +19,7 @@ _strlwr:
 	sta	ptr1	       	; Save s (working copy)
 	stx	ptr1+1
 	sta	ptr2
-	sta	ptr2+2	       	; save function result
+       	sta    	ptr2+1	       	; save function result
 	ldy	#0
 
 loop:	lda    	(ptr1),y       	; get character
diff --git a/libsrc/common/strupper.s b/libsrc/common/strupper.s
index 70b593fab..e33b28675 100644
--- a/libsrc/common/strupper.s
+++ b/libsrc/common/strupper.s
@@ -19,7 +19,7 @@ _strupr:
 	sta	ptr1		; Save s (working copy)
 	stx	ptr1+1
 	sta	ptr2
-	sta	ptr2+2		; save function result
+       	sta    	ptr2+1		; save function result
 	ldy	#0
 
 loop:	lda    	(ptr1),y	; get character