diff -Naur xdemorse/src/Makefile.am xdemorse-mod/src/Makefile.am
--- xdemorse/src/Makefile.am	2009-07-28 08:00:58.000000000 +0200
+++ xdemorse-mod/src/Makefile.am	2012-01-07 21:49:21.890666451 +0100
@@ -19,5 +19,5 @@
 	interface.c	interface.h \
 	callbacks.c	callbacks.h
 
-xdemorse_LDADD = @PACKAGE_LIBS@
+xdemorse_LDADD = @PACKAGE_LIBS@ -lm