diff --git a/configure.ac b/configure.ac
index 73c2b3c1..210eacf8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,6 +15,10 @@ AC_DISABLE_STATIC
 
 AC_LANG([C++])
 AC_PROG_CXX
+
+AC_OPENMP
+CXXFLAGS="$CXXFLAGS $OPENMP_CXXFLAGS"
+
 AC_PROG_LIBTOOL
 LT_INIT