diff --git a/etc/csh.login b/etc/csh.login
index 0b573ff50daa..8eee0a4229bb 100644
--- a/etc/csh.login
+++ b/etc/csh.login
@@ -1 +1,2 @@
 # System-wide .login file for csh(1).
+setenv BLOCKSIZE	K