diff --git a/mozilla/security/nss/lib/nss/nss.def b/mozilla/security/nss/lib/nss/nss.def
index 49330db184e..18afa2d739e 100644
--- a/mozilla/security/nss/lib/nss/nss.def
+++ b/mozilla/security/nss/lib/nss/nss.def
@@ -94,6 +94,7 @@ NSS_Initialize;
 NSS_InitReadWrite;
 NSS_NoDB_Init;
 NSS_Shutdown;
+NSS_VersionCheck;
 PK11_Authenticate;
 PK11_ChangePW;
 PK11_CheckUserPassword;