Index: vor-0.5.5/Makefile.in
===================================================================
--- vor-0.5.5.orig/Makefile.in	2009-12-09 16:28:59.000000000 -0500
+++ vor-0.5.5/Makefile.in	2013-04-12 15:49:11.771845715 -0400
@@ -43,7 +43,7 @@
 SDL_CFLAGS := @SDL_CFLAGS@
 SDL_LIBS := @SDL_LIBS@
 
-ldflags := $(SDL_LIBS) -lSDL_image -lSDL_mixer $(LDFLAGS)
+ldflags := $(SDL_LIBS) -lSDL_image -lSDL_mixer -lm $(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@
