diff --git a/java/jdk13/files/patch-iomgr.c b/java/jdk13/files/patch-iomgr.c
new file mode 100644
index 000000000000..a94c957ab7ef
--- /dev/null
+++ b/java/jdk13/files/patch-iomgr.c
@@ -0,0 +1,12 @@
+$FreeBSD$
+
+--- ../src/solaris/hpi/green_threads/src/iomgr.c	Thu Mar 13 13:55:24 2003
++++ ../src/solaris/hpi/green_threads/src/iomgr.c	Thu Mar 13 13:55:53 2003
+@@ -352,7 +352,6 @@
+      * Get the ttyname, so we can reopen it.
+      */
+     name = ttyname(fd);
+-    sysAssert(name != NULL);
+     if (name == NULL)
+ 	return FALSE;
+