diff --git a/libsrc/runtime/condes.s b/libsrc/runtime/condes.s
index 959ec4a0a..c9e373277 100644
--- a/libsrc/runtime/condes.s
+++ b/libsrc/runtime/condes.s
@@ -64,10 +64,10 @@ loop:	ldy	index
      	beq	done
 	dey
 	jsr	getbyt
-        sta     jmpvec+1
-	dey
-	jsr	getbyt  
         sta     jmpvec+2
+	dey
+	jsr	getbyt
+        sta     jmpvec+1
 	sty	index
 	jsr	jmpvec
 .if (.cpu .bitand ::CPU_ISET_65SC02)
diff --git a/libsrc/serial/ser-kernel.s b/libsrc/serial/ser-kernel.s
index 5e76358be..5601b2c4d 100644
--- a/libsrc/serial/ser-kernel.s
+++ b/libsrc/serial/ser-kernel.s
@@ -69,10 +69,10 @@ _ser_install:
 
         jsr     ser_install             ; Call driver install routine
 
-        lda     ser_irq+2               ; Check high byte of IRQ vector
+        ldy     ser_irq+2               ; Check high byte of IRQ vector
         beq     @L2                     ; Jump if vector invalid
-	lda	#$4C			; Jump opcode
-	sta	ser_irq			; Activate IRQ routine
+	ldy	#$4C			; Jump opcode
+	sty	ser_irq			; Activate IRQ routine
 @L2:    rts
 
 ; Driver signature invalid