diff --git a/Source/HBIOS/dsrtc.asm b/Source/HBIOS/dsrtc.asm
index ecce36ee..81015be0 100644
--- a/Source/HBIOS/dsrtc.asm
+++ b/Source/HBIOS/dsrtc.asm
@@ -482,6 +482,7 @@ DSRTC_DETECT:
 DSRTC_DETECT1:
 	PUSH	AF			; SAVE STATUS
 	LD	A,(DSRTC_TEMP)		; GET SAVED VALUE
+	LD	E,A			; TO E
 	LD	C,30			; NVRAM INDEX 30
 	CALL	DSRTC_SETBYT		; SAVE IT
 	POP	AF			; RECOVER STATUS
diff --git a/Source/HBIOS/rp5rtc.asm b/Source/HBIOS/rp5rtc.asm
index 2a7b99a6..b86ddf70 100644
--- a/Source/HBIOS/rp5rtc.asm
+++ b/Source/HBIOS/rp5rtc.asm
@@ -136,7 +136,7 @@ RP5RTC_DETECT:
 
 RP5RTC_DETECT1:
 	PUSH	AF			; SAVE STATUS
-	LD	A, L			; GET SAVED VALUE
+	LD	E, L			; GET SAVED VALUE
 	LD	C, 0 			; NVRAM INDEX 0
 	CALL	RP5RTC_SETBYT		; SAVE IT
 	POP	AF			; RECOVER STATUS