diff --git a/speaker-test/Makefile.am b/speaker-test/Makefile.am
index b24b4ae..e3551bc 100644
--- a/speaker-test/Makefile.am
+++ b/speaker-test/Makefile.am
@@ -1,6 +1,6 @@
 INCLUDES = -I$(top_srcdir)/include
 SUBDIRS= samples
-LDADD = $(LIBINTL)
+LDADD = $(LIBINTL) -lm
 
 bin_PROGRAMS = speaker-test
 speaker_test_SOURCES = speaker-test.c pink.c