diff --git a/Source/HBIOS/prp.asm b/Source/HBIOS/prp.asm
index f00557ed..db923c5a 100644
--- a/Source/HBIOS/prp.asm
+++ b/Source/HBIOS/prp.asm
@@ -280,7 +280,7 @@ PRPSD_TYPESDXC	.EQU	4		; SDXC CARD (V3)
 PRPSD_STOK	.EQU	0		; OK
 PRPSD_STINVUNIT	.EQU	-1		; INVALID UNIT
 PRPSD_STRDYTO	.EQU	-2		; TIMEOUT WAITING FOR CARD TO BE READY
-PRPSD_STINITTO	.EQU	-3		; INITIALIZATOIN TIMEOUT
+PRPSD_STINITTO	.EQU	-3		; INITIALIZATION TIMEOUT
 PRPSD_STCMDTO	.EQU	-4		; TIMEOUT WAITING FOR COMMAND RESPONSE
 PRPSD_STCMDERR	.EQU	-5		; COMMAND ERROR OCCURRED (REF PRPSD_RC)
 PRPSD_STDATAERR	.EQU	-6		; DATA ERROR OCCURRED (REF PRPSD_TOK)