diff --git a/mozilla/client.mk b/mozilla/client.mk
index 60d4112d3d3..2add1d02243 100644
--- a/mozilla/client.mk
+++ b/mozilla/client.mk
@@ -406,7 +406,7 @@ MODULES_all :=                                  \
 # For branches, uncomment the MOZ_CO_TAG line with the proper tag,
 # and commit this file on that tag.
 #MOZ_CO_TAG          = <tag>
-NSPR_CO_TAG          = NSPRPUB_PRE_4_2_CLIENT_BRANCH
+NSPR_CO_TAG          = NSPR_HEAD_20070713
 NSS_CO_TAG           = NSS_3_11_7_WITH_CKBI_1_64_RTM
 LDAPCSDK_CO_TAG      = LDAPCSDK_6_0_3_CLIENT_BRANCH
 LOCALES_CO_TAG       =