diff --git a/src/kernel/libroot/posix/unistd/Jamfile b/src/kernel/libroot/posix/unistd/Jamfile
index 942c5b6d67..f1736f8516 100644
--- a/src/kernel/libroot/posix/unistd/Jamfile
+++ b/src/kernel/libroot/posix/unistd/Jamfile
@@ -17,6 +17,7 @@ KernelMergeObject posix_unistd.o :
 	<$(SOURCE_GRIST)>open.c
 	<$(SOURCE_GRIST)>read.c
 	<$(SOURCE_GRIST)>sleep.c
+	<$(SOURCE_GRIST)>terminal.c
 	<$(SOURCE_GRIST)>truncate.c
 	<$(SOURCE_GRIST)>usergroup.c
 	<$(SOURCE_GRIST)>usleep.c
diff --git a/src/kernel/libroot/posix/unistd/terminal.c b/src/kernel/libroot/posix/unistd/terminal.c
new file mode 100644
index 0000000000..a8085e68b0
--- /dev/null
+++ b/src/kernel/libroot/posix/unistd/terminal.c
@@ -0,0 +1,17 @@
+/* 
+** Copyright 2003, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
+** Distributed under the terms of the OpenBeOS License.
+*/
+
+
+#include <unistd.h>
+#include <stdio.h>
+
+
+int
+isatty(int file)
+{
+	// ToDo: please fix me!
+	return file < 3;
+}
+