--- src/Makefile.in~	2012-04-14 12:21:48.000000000 -0500
+++ src/Makefile.in	2012-04-15 15:08:44.907617487 -0500
@@ -254,7 +254,7 @@
 INCLUDES = $(all_includes)
 
 # the library search path.
-gnujump_LDFLAGS = $(all_libraries) 
+gnujump_LDFLAGS = $(all_libraries) -lm
 gnujump_SOURCES = \
 	game.h \
 	menu.h \