--- Makefile.am.old	2011-06-14 21:44:40.242317771 +0200
+++ Makefile.am	2011-06-14 21:44:49.216882568 +0200
@@ -17,7 +17,7 @@
 nodist_pengupop_SOURCES = images.h
 
 if LINUX
-pengupop_LDADD = -lSDL -lz
+pengupop_LDADD = -lSDL -lz -lm
 
 endif
 if WIN32
@@ -25,7 +25,7 @@
 endif
 if DARWIN
 pengupop_LDFLAGS = -framework Carbon -framework CoreServices -framework AudioUnit -framework QuickTime -framework Cocoa -framework IOKit -framework OpenGL -framework SDL SDLMain.m
-pengupop_LDADD = -lz -lstdc++
+pengupop_LDADD = -lz -lstdc++ -lm
 
 all-local: Pengupop.dmg