--- a/configure.ac
+++ b/configure.ac
@@ -10,6 +10,7 @@ PKG_CONFIG=`which pkg-config`
 AC_PROG_CXX
 AC_PROG_CC
 AC_PROG_RANLIB
+AM_ICONV
 AC_CHECK_PTHSEM(2.0.4,yes,yes,no)
 AC_CHECK_HEADER(argp.h,,[AC_MSG_ERROR([argp_parse not found])])
 AC_SEARCH_LIBS(argp_parse,argp,,[AC_MSG_ERROR([argp_parse not found])])
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -7,5 +7,5 @@ B64_CFLAGS=
 B64_LIBS=
 endif
 AM_CPPFLAGS=-I$(top_srcdir)/include -I$(top_srcdir)/ticpp $(B64_CFLAGS) $(PTH_CPPFLAGS) $(LIBCURL_CPPFLAGS) $(LOG4CPP_CFLAGS) $(LUA_CFLAGS) $(MYSQL_CFLAGS) $(ESMTP_CFLAGS)
-linknx_LDADD=$(top_srcdir)/ticpp/libticpp.a $(B64_LIBS) $(PTH_LDFLAGS) $(PTH_LIBS) $(LIBCURL) $(LOG4CPP_LIBS) $(LUA_LIBS) $(MYSQL_LIBS) $(ESMTP_LIBS) -lm
+linknx_LDADD=$(top_srcdir)/ticpp/libticpp.a $(LIBICONV) $(B64_LIBS) $(PTH_LDFLAGS) $(PTH_LIBS) $(LIBCURL) $(LOG4CPP_LIBS) $(LUA_LIBS) $(MYSQL_LIBS) $(ESMTP_LIBS) -lm
 linknx_SOURCES=linknx.cpp logger.cpp ruleserver.cpp objectcontroller.cpp eibclient.c threads.cpp timermanager.cpp  persistentstorage.cpp xmlserver.cpp smsgateway.cpp emailgateway.cpp knxconnection.cpp services.cpp suncalc.cpp  luacondition.cpp ioport.cpp ruleserver.h objectcontroller.h threads.h timermanager.h persistentstorage.h xmlserver.h smsgateway.h emailgateway.h knxconnection.h services.h suncalc.h luacondition.h ioport.h logger.h
