diff --git a/build/tools/spec/clang2mpl.cfg b/build/tools/spec/clang2mpl.cfg
index 439eedf7731c4b18d329c839196acfd202cd988c..c343c5a2844417fd22a8c539d020199988149179 100644
--- a/build/tools/spec/clang2mpl.cfg
+++ b/build/tools/spec/clang2mpl.cfg
@@ -216,7 +216,7 @@ default:               # data model applies to all benchmarks
    fail_build = 1
 %else
    intspeed,fpspeed:
-      EXTRA_OPTIMIZE = -fopenmp -DSPEC_OPENMP
+      EXTRA_OPTIMIZE = -fopenmp -lgomp -DSPEC_OPENMP
    fpspeed:
       #
       # 627.cam4 needs a big stack; the preENV will apply it to all