diff --git a/libsrc/atari/read.s b/libsrc/atari/read.s
index de2990d1a..ef16ae8ce 100644
--- a/libsrc/atari/read.s
+++ b/libsrc/atari/read.s
@@ -1,7 +1,7 @@
 ;
 ; Christian Groessler, Apr-2000
 ;
-; int read(int fd,void *buf,int count)
+; int __fastcall__ read(int fd,void *buf,int count)
 ;
 
 	.include "atari.inc"
diff --git a/libsrc/atari/write.s b/libsrc/atari/write.s
index e6bc8cc8d..d048dfd46 100644
--- a/libsrc/atari/write.s
+++ b/libsrc/atari/write.s
@@ -1,5 +1,5 @@
 ;
-; write(iocb, buf, nbytes)->nbytes written
+; int __fastcall__ write (int fd, const void* buf, unsigned count);
 ;
 	.include "atari.inc"
 	.import __rwsetup,__do_oserror,__inviocb,__oserror