diff -Naur wmlife-1.0.0-orig/configure.in wmlife-1.0.0/configure.in
--- wmlife-1.0.0-orig/configure.in	2005-09-23 00:18:09.000000000 +0300
+++ wmlife-1.0.0/configure.in	2014-04-28 23:52:09.701103219 +0300
@@ -38,6 +38,6 @@
 AC_CACHE_CHECK([for gdk2 libs], GDKLIBS, [GDKLIBS=`$config --libs gtk+-2.0 | sed -e "s/-lgtk-x11-2.0//g" -e "s/-latk-1.0//g"`])
 
 CFLAGS="$CFLAGS $GDKINCS"
-LDFLAGS="$LDFLAGS $GDKLIBS"
+LDFLAGS="$LDFLAGS $GDKLIBS -lm"
 
 AC_OUTPUT(Makefile src/Makefile)