diff --git a/var/spack/repos/builtin/packages/clapack/package.py b/var/spack/repos/builtin/packages/clapack/package.py
index dd0076db439..e7832ef4ecb 100644
--- a/var/spack/repos/builtin/packages/clapack/package.py
+++ b/var/spack/repos/builtin/packages/clapack/package.py
@@ -50,6 +50,7 @@ def edit(self, spec, prefix):
             make_inc = FileFilter('make.inc')
             make_inc.filter(r'^BLASLIB.*',
                             'BLASLIB = ../../libcblaswr.a -lcblas -latlas')
+            makefile = FileFilter('Makefile')
             makefile.filter(r'^lib.*',
                             'lib: variants lapacklib tmglib')