diff --git a/flake8_debugger.py b/flake8_debugger.py
index c96aae6..d3f0094 100644
--- a/flake8_debugger.py
+++ b/flake8_debugger.py
@@ -56,7 +56,7 @@ def visit_Call(self, node):
         debugger_method_names = chain(debuggers.values(), self.debuggers_traces_names.values())
         is_debugger_attribute = getattr(node.func, "attr", None) in list(debugger_method_names)
         if is_debugger_attribute:
-            caller = node.func.value.id
+            caller = getattr(node.func.value, "id", None)
             entry = self.debuggers_used.setdefault((node.lineno, node.col_offset), [])
             if caller in self.debuggers_names.values():
                 entry.append('{0} trace found: {1}.{2} used'.format(DEBUGGER_ERROR_CODE, caller, node.func.attr))
diff --git a/test_linter.py b/test_linter.py
index c2e9594..2df37f3 100644
--- a/test_linter.py
+++ b/test_linter.py
@@ -78,6 +78,15 @@ def test_catches_simple_debugger_when_called_off_lib(self):
 
         assert result == expected_result
 
+    def test_catches_simple_debugger_when_called_off_global(self):
+        result = check_code_for_debugger_statements("__import__('ipdb').set_trace()")
+
+        expected_result = [
+            {'line': 1, 'message': 'T002 trace found: set_trace used', 'col': 0},
+        ]
+
+        assert result == expected_result
+
     @pytest.mark.skipif(True, reason="Not supported just yet")
     def test_catches_simple_debugger_when_called_off_var(self):
         result = check_code_for_debugger_statements('import ipdb\ntest = ipdb.set_trace\ntest()')