diff --git a/var/spack/repos/builtin/packages/aegean/package.py b/var/spack/repos/builtin/packages/aegean/package.py
index 9198280e9a0..eea46740a0a 100644
--- a/var/spack/repos/builtin/packages/aegean/package.py
+++ b/var/spack/repos/builtin/packages/aegean/package.py
@@ -21,4 +21,7 @@ class Aegean(MakefilePackage):
 
     def edit(self, spec, prefix):
         makefile = FileFilter('Makefile')
+        if spec.target.family == 'aarch64':
+            makefile.filter('-m64', '')
+
         makefile.filter('/usr/local', prefix)