Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -183,10 +183,11 @@
 			ac_cv_snprintf_useful_ret="no")])
 		AC_MSG_RESULT($ac_cv_snprintf_useful_ret)])
 test x"$have_asprintf" != x"yes" -a x"$ac_cv_snprintf_useful_ret" != x"yes" && \
 	AC_MSG_ERROR(No asprintf and no snprintf returning required space!)
 
+AC_CHECK_LIB(m, fmod, LIBS="$LIBS -lm")
 AC_CHECK_LIB(dl, dlopen, LIBS="$LIBS -ldl")
 
 AC_ARG_ENABLE(threads,
 	AS_HELP_STRING([--disable-threads], [disable thread support]))
 if test x"$enable_threads" != x"no"; then