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-rw-r--r--libguile/fports.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/libguile/fports.c b/libguile/fports.c
index 046bdf60a..a14130b40 100644
--- a/libguile/fports.c
+++ b/libguile/fports.c
@@ -306,8 +306,12 @@ SCM_DEFINE (scm_open_file, "open-file", 2, 0, 0,
case '+':
flags = (flags & ~(O_RDONLY | O_WRONLY)) | O_RDWR;
break;
+ case 'b':
+#if defined (O_BINARY)
+ flags |= O_BINARY;
+#endif
+ break;
case '0': /* unbuffered: handled later. */
- case 'b': /* 'binary' mode: ignored. */
case 'l': /* line buffered: handled during output. */
break;
default: