diff --git a/libsrc/atari/graphics.s b/libsrc/atari/graphics.s
index 60f2ff789..1c6856296 100644
--- a/libsrc/atari/graphics.s
+++ b/libsrc/atari/graphics.s
@@ -10,7 +10,7 @@
         .export __graphics
 
         .import findfreeiocb
-        .import __do_oserror,__oserror
+        .import __oserror
         .import fddecusage
         .import clriocb
         .import fdtoiocb
@@ -96,8 +96,13 @@ doopen: txa
         stx     __oserror
         rts
 
-cioerr: jsr     fddecusage      ; decrement usage counter of fd as open failed
-        jmp     __do_oserror
+cioerr: sty     tmp3            ; remember error code
+        lda     #CLOSE
+        sta     ICCOM,x
+        jsr     CIOV            ; close IOCB again since open failed
+        jsr     fddecusage      ; and decrement usage counter of fd
+        lda     tmp3            ; put error code into A
+        jmp     __mappederrno
 
 .endproc        ; __graphics
 
diff --git a/libsrc/atari/open.s b/libsrc/atari/open.s
index 8aeff9ed4..306cf52c2 100644
--- a/libsrc/atari/open.s
+++ b/libsrc/atari/open.s
@@ -140,8 +140,12 @@ finish: php
         plp
 
         bpl     ok
-        jsr     fddecusage      ; decrement usage counter of fd as open failed
-        tya                     ; put error code into A
+        sty     tmp3            ; remember error code
+        lda     #CLOSE
+        sta     ICCOM,x
+        jsr     CIOV            ; close IOCB again since open failed
+        jsr     fddecusage      ; and decrement usage counter of fd
+        lda     tmp3            ; put error code into A
         jmp     __mappederrno
 
 ok:     lda     tmp2            ; get fd
diff --git a/libsrc/atari/posixdirent.s b/libsrc/atari/posixdirent.s
index 3417e4bfc..a722b3b06 100644
--- a/libsrc/atari/posixdirent.s
+++ b/libsrc/atari/posixdirent.s
@@ -63,6 +63,9 @@
 .endproc
 
 cioerr:         sty     __oserror
+                lda     #CLOSE
+                sta     ICCOM,x
+                jsr     CIOV            ; close IOCB again since open failed
                 jmp     return0
 
 .proc   _readdir