diff --git a/libwpd.spec b/libwpd.spec
index 3ea8e5c..eba6186 100644
--- a/libwpd.spec
+++ b/libwpd.spec
@@ -11,6 +11,7 @@ URL: http://libwpd.sf.net/
 License: LGPLv2+ or MPLv2.0+
 
 BuildRequires: cppunit-devel
+BuildRequires: zlib-devel
 
 %description
 Library that handles Word Perfect documents.