diff --git a/libsrc/cbm/filename.s b/libsrc/cbm/filename.s
index fb8c9978e..b458b8efb 100644
--- a/libsrc/cbm/filename.s
+++ b/libsrc/cbm/filename.s
@@ -27,23 +27,9 @@ nameloop:
         lda     (ptr1),y        ; Get next char from filename
         beq     namedone        ; Jump if end of name reached
 
-; Check for valid chars in the file name. We allow letters, digits, plus some
-; additional chars from a table.
-
-        ldx     #fncharcount-1
-namecheck:
-        cmp     fnchars,x
-        beq     nameok
-        dex
-        bpl     namecheck
-        tax
-        lda     __ctype,x
-        and     #CT_ALNUM
-        beq     invalidname
-
 ; Check the maximum length, store the character
 
-nameok: ldx     tmp1
+        ldx     tmp1
         cpx     #16             ; Maximum length reached?
         bcs     invalidname
         lda     (ptr1),y        ; Reload char
@@ -188,10 +174,3 @@ fnlen:  .res    1
 fncmd:  .byte   's'     ; Use as scratch command
 fnbuf:  .res    35      ; Either 0:0123456789012345,t,m
                         ; Or     0:0123456789012345=0123456789012345
-.rodata
-; Characters that are ok in filenames besides digits and letters
-fnchars:.byte   ".,-_+()"
-fncharcount = *-fnchars
-
-
-