diff --git a/ncat/ncat_core.c b/ncat/ncat_core.c
index 51af9a813..8332c5b7c 100644
--- a/ncat/ncat_core.c
+++ b/ncat/ncat_core.c
@@ -459,9 +459,9 @@ int ncat_delay_timer(int delayval)
 int ncat_openlog(const char *logfile, int append)
 {
     if (append)
-        return Open(logfile, O_WRONLY | O_CREAT | O_APPEND, 0664);
+        return Open(logfile, O_BINARY | O_WRONLY | O_CREAT | O_APPEND, 0664);
     else
-        return Open(logfile, O_WRONLY | O_CREAT | O_TRUNC, 0664);
+        return Open(logfile, O_BINARY | O_WRONLY | O_CREAT | O_TRUNC, 0664);
 }
 
 static int ncat_hexdump(int logfd, const char *data, int len);