--- ft2demos-2.3.6/graph/x11/rules.mk.mathlib	2004-08-04 16:11:22.534818408 -0400
+++ ft2demos-2.3.6/graph/x11/rules.mk	2004-08-04 16:11:35.317875088 -0400
@@ -70,7 +70,7 @@
   ifeq ($(PLATFORM),unix)
     GRAPH_LINK += $(X11_LIB:%=-R%)
   endif
-  GRAPH_LINK += $(X11_LIB:%=-L%) -lX11
+  GRAPH_LINK += $(X11_LIB:%=-L%) -lX11 -lm
 
   # Solaris needs a -lsocket in GRAPH_LINK.
   #