--- libvorbis-1.3.2.orig/test/Makefile.am
+++ libvorbis-1.3.2/test/Makefile.am
@@ -10,7 +10,7 @@
 	./test$(EXEEXT)
 
 test_SOURCES = util.c util.h write_read.c write_read.h test.c
-test_LDADD = ../lib/libvorbisenc.la ../lib/libvorbis.la @OGG_LIBS@
+test_LDADD = ../lib/libvorbisenc.la ../lib/libvorbis.la @OGG_LIBS@ -lm
 
 debug:
 	$(MAKE) all CFLAGS="@DEBUG@"