--- Makefile.old	2011-06-20 21:25:56.788323912 +0200
+++ Makefile	2011-06-20 21:26:11.970287694 +0200
@@ -27,7 +27,7 @@
 #SOUNDLIBRARIES=
 SOUNDLIBRARIES=-lSDL_mixer
 
-LIBRARIES=`sdl-config --libs` -lSDL_image $(SOUNDLIBRARIES)
+LIBRARIES=`sdl-config --libs` -lSDL_image $(SOUNDLIBRARIES) -lm
 
 all:	$(EXENAME)