diff --git a/lib/spack/spack/abi.py b/lib/spack/spack/abi.py
index 7a6f9c3f40691d1c2e67916cb910171162e91326..b3b1dd6d27838b868a935ead63be0161d11630aa 100644
--- a/lib/spack/spack/abi.py
+++ b/lib/spack/spack/abi.py
@@ -26,6 +26,7 @@
 import os
 import spack
 import spack.spec
+from spack.build_environment import dso_suffix
 from spack.spec import CompilerSpec
 from spack.util.executable import Executable, ProcessError
 from llnl.util.lang import memoized