diff --git a/network/mail/thunderbird/pspec.xml b/network/mail/thunderbird/pspec.xml
index 603908ab43..1e76326322 100644
--- a/network/mail/thunderbird/pspec.xml
+++ b/network/mail/thunderbird/pspec.xml
@@ -37,6 +37,8 @@
             <Dependency>pixman-devel</Dependency>
             <Dependency>hunspell-devel</Dependency>
             <Dependency>libevent-devel</Dependency>
+            <Dependency>gconf-devel</Dependency>
+            <Dependency>startup-notification-devel</Dependency>
         </BuildDependencies>
         <Patches>
             <Patch level="1">thunderbird-install-dir.patch</Patch>