diff --git a/src/ccp.asm b/src/ccp.asm
index b63bbd9..ddf9424 100644
--- a/src/ccp.asm
+++ b/src/ccp.asm
@@ -57,13 +57,8 @@ prompt	mov ax, cs
 
 	; parse inbuf into comfcb, buf, fcb1 and fcb2
 	; takes no arguments
-	; clear out fcb area, dosbox seems to have troubles with leftovers
-parse	mov di, fcb1
-	mov cx, buf-fcb1+0x80
-	mov al, 0
-	rep stosb
 	; parse off command name
-	mov si, inbuf+2
+parse	mov si, inbuf+2
 	mov di, comfcb
 	call lodfn
 	; trim spaces
@@ -83,10 +78,20 @@ parse	mov di, fcb1
 	mov si, buf+1
 	mov di, fcb1
 	call lodfn
+	; fill space between with zeroes
+	add di, 12
+	mov cx, fcb2-fcb1-12
+	mov al, 0
+	rep stosb
 	; parse fcb2
 	call eatws
 	mov di, fcb2
 	call lodfn
+	; fill space between with zeroes
+	add di, 12
+	mov cx, buf-fcb2-12
+	mov al, 0
+	rep stosb
 	; dump out everything parsed for me to see
 	;mov si, comfcb
 	;call dump