diff --git a/config/pac.m4 b/config/pac.m4
index 847f01c5..410d8bea 100644
--- a/config/pac.m4
+++ b/config/pac.m4
@@ -1085,7 +1085,7 @@ esac
 #AC_FC_FUNC(sgemm)
 #AC_FC_FUNC(dgemm)
 
-#pac_blas_save_LIBS="$LIBS"
+pac_blas_save_LIBS="$LIBS"
 #LIBS="$LIBS $FLIBS"
 AC_LANG([Fortran])
 
diff --git a/configure b/configure
index 64600a75..624f3f93 100755
--- a/configure
+++ b/configure
@@ -8117,7 +8117,7 @@ esac
 #AC_FC_FUNC(sgemm)
 #AC_FC_FUNC(dgemm)
 
-#pac_blas_save_LIBS="$LIBS"
+pac_blas_save_LIBS="$LIBS"
 #LIBS="$LIBS $FLIBS"
 ac_ext=${ac_fc_srcext-f}
 ac_compile='$FC -c $FCFLAGS $ac_fcflags_srcext conftest.$ac_ext >&5'