diff --git a/a52dec/src/Makefile.am b/a52dec/src/Makefile.am

index bae6bd9..4a295d5 100644

--- a/a52dec/src/Makefile.am

+++ b/a52dec/src/Makefile.am

@@ -3,7 +3,7 @@ CFLAGS = @A52DEC_CFLAGS@

 bin_PROGRAMS = a52dec extract_a52

 a52dec_SOURCES = a52dec.c getopt.c gettimeofday.c

 a52dec_LDADD = $(top_builddir)/liba52/liba52.la \

-	       $(top_builddir)/libao/libao.a @LIBAO_LIBS@

+	       $(top_builddir)/libao/libao.a @LIBAO_LIBS@ -lm

 extract_a52_SOURCES = extract_a52.c getopt.c

 man_MANS = a52dec.1 extract_a52.1