diff --git a/slither/printers/inheritance/inheritance_graph.py b/slither/printers/inheritance/inheritance_graph.py
index ab19c56656..0de5edc909 100644
--- a/slither/printers/inheritance/inheritance_graph.py
+++ b/slither/printers/inheritance/inheritance_graph.py
@@ -108,8 +108,9 @@ def _summary(self, contract):
         ]
 
         # Add arrows (number them if there is more than one path so we know order of declaration for inheritance).
+        # Note: `inheritance` is already filtered to exclude mocks and (by default) interfaces.
         if len(inheritance) == 1:
-            immediate_inheritance = contract.immediate_inheritance[0]
+            immediate_inheritance = inheritance[0]
             ret += f"c{contract.id}_{contract.name} -> c{immediate_inheritance.id}_{immediate_inheritance};\n"
         else:
             for i, immediate_inheritance in enumerate(inheritance):
diff --git a/tests/e2e/printers/test_data/test_contract_names/D.sol b/tests/e2e/printers/test_data/test_contract_names/D.sol
new file mode 100644
index 0000000000..927151d438
--- /dev/null
+++ b/tests/e2e/printers/test_data/test_contract_names/D.sol
@@ -0,0 +1,11 @@
+import "./A.sol";
+
+interface MyInterfaceY {
+    function ping() external;
+}
+
+// Intentionally list the interface first to ensure the inheritance-graph printer
+// respects the interface filtering logic (see issue #2150).
+contract D is MyInterfaceY, A {
+    function ping() external override {}
+}
diff --git a/tests/e2e/printers/test_printers.py b/tests/e2e/printers/test_printers.py
index 8d9d15f603..dc2861c834 100644
--- a/tests/e2e/printers/test_printers.py
+++ b/tests/e2e/printers/test_printers.py
@@ -29,6 +29,7 @@ def test_inheritance_graph_printer(solc_binary_path) -> None:
     standard_json.add_source_file(Path(TEST_DATA_DIR, "test_contract_names", "B.sol").as_posix())
     standard_json.add_source_file(Path(TEST_DATA_DIR, "test_contract_names", "B2.sol").as_posix())
     standard_json.add_source_file(Path(TEST_DATA_DIR, "test_contract_names", "C.sol").as_posix())
+    standard_json.add_source_file(Path(TEST_DATA_DIR, "test_contract_names", "D.sol").as_posix())
     compilation = CryticCompile(standard_json, solc=solc_path)
     slither = Slither(compilation)
     printer = PrinterInheritanceGraph(slither=slither, logger=None)
@@ -44,6 +45,7 @@ def test_inheritance_graph_printer(solc_binary_path) -> None:
 
     assert counter["B -> A"] == 2
     assert counter["C -> A"] == 1
+    assert counter["D -> A"] == 1
     # Let also test the include/exclude interface behavior
     # Check that the interface is not included
     assert "MyInterfaceX" not in content