diff --git a/libctl.spec b/libctl.spec
index 3a251ff..92aab88 100644
--- a/libctl.spec
+++ b/libctl.spec
@@ -1,6 +1,6 @@
 Name:          libctl
 Version:       3.2.1
-Release:       2mamba
+Release:       3mamba
 Summary:       A free Guile-based library implementing flexible control files for scientific simulations
 Group:         System/Libraries
 Vendor:        openmamba
@@ -18,6 +18,7 @@ BuildRequires: libguile-devel
 BuildRequires: libltdl-devel
 BuildRequires: libunistring-devel
 ## AUTOBUILDREQ-END
+BuildRequires: libunistring-devel >= 0.9.6-1mamba
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
@@ -81,6 +82,9 @@ This package contains libraries and header files for developing applications tha
 %doc ChangeLog NEWS README TODO
 
 %changelog
+* Sun May 15 2016 Silvan Calarco <silvan.calarco@mambasoft.it> 3.2.1-3mamba
+- rebuilt by autoport with build requirements: libunistring-devel>=0.9.6-1mamba
+
 * Tue Dec 17 2013 Silvan Calarco <silvan.calarco@mambasoft.it> 3.2.1-2mamba
 - move %{_datadir}/libctl from devel to main package