diff --git a/tracetools_analysis/tracetools_analysis/processor/__init__.py b/tracetools_analysis/tracetools_analysis/processor/__init__.py
index 380e970..c6c3921 100644
--- a/tracetools_analysis/tracetools_analysis/processor/__init__.py
+++ b/tracetools_analysis/tracetools_analysis/processor/__init__.py
@@ -495,7 +495,7 @@ class AutoProcessor():
         Get applicable EventHandler instances for a list of events.
 
         :param events: the list of events
-        :return the concrete EventHandler instances which are applicable
+        :return: the concrete EventHandler instances which are applicable
         """
         event_names = Processor.get_event_names(events)
         # Force import of all processor submodules (i.e. files) so that we can find all
diff --git a/tracetools_analysis/tracetools_analysis/utils/ros2.py b/tracetools_analysis/tracetools_analysis/utils/ros2.py
index 049ece4..b4934b9 100644
--- a/tracetools_analysis/tracetools_analysis/utils/ros2.py
+++ b/tracetools_analysis/tracetools_analysis/utils/ros2.py
@@ -133,7 +133,7 @@ class Ros2DataModelUtil(DataModelUtil):
 
         :param callback_obj: the callback object value
         :return: a dataframe containing the start timestamp (datetime)
-        and duration (ms) of all callback instances for that object
+            and duration (ms) of all callback instances for that object
         """
         data = self.data.callback_instances.loc[
             self.data.callback_instances.loc[:, 'callback_object'] == callback_obj,