--- Makefile.in	2009-12-09 22:28:59.000000000 +0100
+++ Makefile.in.old	2010-05-14 20:37:03.000000000 +0200
@@ -43,7 +43,7 @@
 SDL_CFLAGS := @SDL_CFLAGS@
 SDL_LIBS := @SDL_LIBS@
 
-ldflags := $(SDL_LIBS) -lSDL_image -lSDL_mixer $(LDFLAGS)
+ldflags := $(SDL_LIBS) -lm -lSDL_image -lSDL_mixer $(LDFLAGS)
 cflags := -I. $(SDL_CFLAGS) $(paths) $(CFLAGS)
 
 my_objects := args.@OBJEXT@ dust.@OBJEXT@ file.@OBJEXT@ mt.@OBJEXT@ rocks.@OBJEXT@ score.@OBJEXT@ sprite.@OBJEXT@ sound.@OBJEXT@ autopilot.@OBJEXT@