diff --git a/lib/spack/spack/spec.py b/lib/spack/spack/spec.py
index 2cfcb7f3410818920286d924be94b39a7e2ae869..7c09af4c210169b1c9de88c029783a6781d76056 100644
--- a/lib/spack/spack/spec.py
+++ b/lib/spack/spack/spec.py
@@ -1750,8 +1750,7 @@ def _cmp_node(self):
                 self.variants,
                 self.architecture,
                 self.compiler,
-                self.compiler_flags,
-                self.dag_hash())
+                self.compiler_flags)
 
     def eq_node(self, other):
         """Equality with another spec, not including dependencies."""