Index: uspace/lib/libc/generic/io/io.c
===================================================================
--- uspace/lib/libc/generic/io/io.c	(revision 5434000ae724f7d614db93420f8726e73e5ff54a)
+++ uspace/lib/libc/generic/io/io.c	(revision 92454138de3db76b779e4a3ddf80182cb677196d)
@@ -554,4 +554,15 @@
 }
 
+int ftell(FILE *stream)
+{
+	off_t rc = lseek(stream->fd, 0, SEEK_CUR);
+	if (rc == (off_t) (-1)) {
+		/* errno has been set by lseek. */
+		return -1;
+	}
+
+	return rc;
+}
+
 void rewind(FILE *stream)
 {