diff --git a/freeglut/freeglut/progs/demos/Lorenz/Makefile.am b/freeglut/freeglut/progs/demos/Lorenz/Makefile.am
index 9180fc3..532184d 100644
--- a/freeglut/freeglut/progs/demos/Lorenz/Makefile.am
+++ b/freeglut/freeglut/progs/demos/Lorenz/Makefile.am
@@ -2,5 +2,5 @@ EXTRA_DIST = lorenz.c lorenz.dsp
 noinst_PROGRAMS = lorenz
 lorenz_SOURCES = lorenz.c
 lorenz_LDFLAGS = -export-dynamic
-lorenz_LDADD = ../../../src/lib@LIBRARY@.la $(GL_LIBS)
+lorenz_LDADD = ../../../src/lib@LIBRARY@.la $(GL_LIBS) -lm
 lorenz_CFLAGS = -I$(top_srcdir)/include $(X_CFLAGS)
diff --git a/freeglut/freeglut/progs/demos/spaceball/Makefile.am b/freeglut/freeglut/progs/demos/spaceball/Makefile.am
index e2a3ab4..13663fc 100644
--- a/freeglut/freeglut/progs/demos/spaceball/Makefile.am
+++ b/freeglut/freeglut/progs/demos/spaceball/Makefile.am
@@ -2,5 +2,5 @@ EXTRA_DIST = spaceball.c vmath.c vmath.h vmath.inl
 noinst_PROGRAMS = spaceball
 spaceball_SOURCES = spaceball.c vmath.c
 spaceball_LDFLAGS = -export-dynamic
-spaceball_LDADD = ../../../src/lib@LIBRARY@.la $(GL_LIBS)
+spaceball_LDADD = ../../../src/lib@LIBRARY@.la $(GL_LIBS) -lm
 spaceball_CFLAGS = -I$(top_srcdir)/include $(X_CFLAGS)