diff --git a/libmng.spec b/libmng.spec
index a4acbff..8da20eb 100644
--- a/libmng.spec
+++ b/libmng.spec
@@ -10,6 +10,7 @@ BuildRoot: %{_tmppath}/%{name}-%{version}-root
 BuildRequires: zlib-devel
 BuildRequires: libjpeg-devel
 BuildRequires: lcms-devel
+BuildRequires: libtool
 
 %package devel
 Summary: Development files for the Multiple-image Network Graphics library