diff --git a/Makefile.am b/Makefile.am
index 50ea60a..e105ca0 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -60,7 +60,7 @@ EXTRA_DIST = \
 
 check_PROGRAMS = sharp2_testsuite
 sharp2_testsuite_SOURCES = test/sharp2_testsuite.c test/memusage.c test/memusage.h
-sharp2_testsuite_LDADD = libsharp2.la -lm
+sharp2_testsuite_LDADD = libsharp2.la
 
 TESTS = runtest.sh
 
diff --git a/configure.ac b/configure.ac
index 28ec900..3b40dc2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -22,6 +22,10 @@ m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 
 AC_PROG_CC_C99
 AC_OPENMP
+
+# add math library
+LIBS="-lm"
+
 AC_PROG_LIBTOOL
 
 tmpval=`echo $CFLAGS | grep -c '\-DMULTIARCH'`