diff --git a/devito/passes/clusters/aliases.py b/devito/passes/clusters/aliases.py
index 6e67329611..106a0c8c79 100644
--- a/devito/passes/clusters/aliases.py
+++ b/devito/passes/clusters/aliases.py
@@ -1169,8 +1169,12 @@ def _pivot_min_intervals(self):
 
             for d, v in distance:
                 value = v.pop()
-                ret[d][0] = min(ret[d][0], value)
-                ret[d][1] = max(ret[d][1], value)
+                try:
+                    ret[d][0] = min(ret[d][0], value)
+                    ret[d][1] = max(ret[d][1], value)
+                except TypeError:
+                    ret[d][0] = min(ret[d][0], 0)
+                    ret[d][1] = max(ret[d][1], 0)
 
         ret = {d: Interval(d, m, M) for d, (m, M) in ret.items()}
 
diff --git a/tests/test_dse.py b/tests/test_dse.py
index d11f25f16e..eee0027896 100644
--- a/tests/test_dse.py
+++ b/tests/test_dse.py
@@ -2604,6 +2604,16 @@ def test_premature_evalderiv_lowering(self):
         assert len([i for i in FindSymbols().visit(op) if i.is_Array]) == 1
         assert op._profiler._sections['section0'].sops == 16
 
+    def test_issue_2163(self):
+        grid = Grid((3, 3))
+        z = grid.dimensions[-1]
+        mapper = {z: INT(abs(z-1))}
+
+        u = TimeFunction(name="u", grid=grid)
+        op = Operator(Eq(u.forward, u.dy.dy.subs(mapper),
+                         subdomain=grid.interior))
+        assert_structure(op, ['t,i0x,i0y'], 'ti0xi0y')
+
 
 class TestIsoAcoustic(object):