diff --git a/spandsp.spec b/spandsp.spec
index 0d1696d2..ec62d3a7 100644
--- a/spandsp.spec
+++ b/spandsp.spec
@@ -19,6 +19,7 @@ BuildRequires: libsndfile-devel%{?_isa}
 BuildRequires: doxygen
 BuildRequires: libxslt
 BuildRequires: docbook-style-xsl
+BuildRequires: libtool
 
 %description
 SpanDSP is a library of DSP functions for telephony, in the 8000