diff --git a/libsrc/c64/crt0.s b/libsrc/c64/crt0.s
index 92ef5bcf1..70df21d7c 100644
--- a/libsrc/c64/crt0.s
+++ b/libsrc/c64/crt0.s
@@ -1,4 +1,4 @@
-;     
+;
 ; Startup code for cc65 (C64 version)
 ;
 ; This must be the *first* file on the linker command line
@@ -52,26 +52,27 @@ L1:	lda	sp,x
 	lda	#14
 	jsr	BSOUT
 
-; Clear the BSS data
-
-	jsr	zerobss
-
 ; Save system stuff and setup the stack
 
-       	tsx
-       	stx    	spsave 		; Save the system stack ptr
-
 	lda	$01
-	sta	mmusave      	; Save the memory configuration
+       	tax                     ; Remember in X
 	and	#$F8
        	ora	#$06		; Enable kernal+I/O, disable basic
 	sta	$01
+        stx	mmusave      	; Save the memory configuration
+
+       	tsx
+       	stx    	spsave 		; Save the system stack ptr
 
 	lda    	#<(__RAM_START__ + __RAM_SIZE__)
 	sta	sp
 	lda	#>(__RAM_START__ + __RAM_SIZE__)
        	sta	sp+1   		; Set argument stack ptr
 
+; Clear the BSS data
+
+	jsr	zerobss
+
 ; Call module constructors
 
 	jsr	initlib