diff --git a/3rdparty/ext_xml/CMakeLists.txt b/3rdparty/ext_xml/CMakeLists.txt
index 7dd26887a..5a3c15522 100644
--- a/3rdparty/ext_xml/CMakeLists.txt
+++ b/3rdparty/ext_xml/CMakeLists.txt
@@ -1,16 +1,16 @@
 SET(PREFIX_ext_xml "${EXTPREFIX}" )
 
 ExternalProject_Add(
   ext_xml
   DOWNLOAD_DIR ${EXTERNALS_DOWNLOAD_DIR}
   URL ftp://xmlsoft.org/libxslt/libxml2-2.9.7.tar.gz
   URL_MD5 896608641a08b465098a40ddf51cefba
 
   INSTALL_DIR ${PREFIX_ext_xml}
-  CONFIGURE_COMMAND ./configure --prefix=${PREFIX_ext_xml} --without-python
+  CONFIGURE_COMMAND ./configure LIBS="-liconv" --prefix=${PREFIX_ext_xml} --without-python
   BUILD_COMMAND make
   INSTALL_COMMAND make install
 
   UPDATE_COMMAND ""
   BUILD_IN_SOURCE 1
 )