diff --git a/thunderbird.spec b/thunderbird.spec
index 1441438..4528f26 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -38,7 +38,7 @@ Group:          Applications/Internet
 Source0:        %{tarball}
 %if %{build_langpacks}
 # Language package archive is build by RH
-Source1:        thunderbird-langpacks-%{version}-20100621.tar.bz2
+Source1:        thunderbird-langpacks-%{version}rc2-20100621.tar.bz2
 %endif
 # Config file for compilation
 Source10:       thunderbird-mozconfig