diff --git a/thunderbird.spec b/thunderbird.spec
index f43729a..cc7d154 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -297,7 +297,6 @@ BuildRequires:  libjpeg-devel
 BuildRequires:  zip
 BuildRequires:  bzip2-devel
 BuildRequires:  pkgconfig(zlib)
-BuildRequires:  pkgconfig(libIDL-2.0)
 BuildRequires:  pkgconfig(gtk+-2.0)
 BuildRequires:  krb5-devel
 BuildRequires:  pkgconfig(pango)