diff -r a94233c4e86a -r a26a3f0b94d3 platforms/opensuse/Dockerfile.in
--- a/platforms/opensuse/Dockerfile.in	Wed Apr 08 21:59:47 2015 +0200
+++ b/platforms/opensuse/Dockerfile.in	Tue Apr 14 23:36:09 2015 +0200
@@ -9,6 +9,7 @@
 RUN zypper -n install --no-recommends mysql-devel postgresql-devel 
 RUN zypper -n install --no-recommends sqlite-devel openldap2-devel 
 RUN zypper -n install --no-recommends autoconf sudo less net-tools
+RUN zypper -n install --no-recommends libidn-devel
 
 # prepare user environment for running (exim) and testing exim (eximtest)
 RUN groupadd --system exim