diff --git a/libuavcan/include/uavcan/node/timer.hpp b/libuavcan/include/uavcan/node/timer.hpp
index 95ed0096c1..3e0b360a84 100644
--- a/libuavcan/include/uavcan/node/timer.hpp
+++ b/libuavcan/include/uavcan/node/timer.hpp
@@ -125,7 +125,7 @@ public:
 
     /**
      * Get/set the callback object.
-     * Callback must be set before the first event; otherwise the event will generate a fatal error.
+     * Callback must be set before the first event happens; otherwise the event will generate a fatal error.
      */
     const Callback& getCallback() const { return callback_; }
     void setCallback(const Callback& callback) { callback_ = callback; }
diff --git a/libuavcan_drivers/linux/include/uavcan_linux/helpers.hpp b/libuavcan_drivers/linux/include/uavcan_linux/helpers.hpp
index 7c252f2909..608330fb48 100644
--- a/libuavcan_drivers/linux/include/uavcan_linux/helpers.hpp
+++ b/libuavcan_drivers/linux/include/uavcan_linux/helpers.hpp
@@ -103,7 +103,7 @@ public:
     bool wasSuccessful() const { return call_was_successful_; }
 
     /**
-     * Use this to retrieve the response on the last blocking service call.
+     * Use this to retrieve the response of the last blocking service call.
      * This method returns default constructed response object if the last service call was unsuccessful.
      */
     const typename DataType::Response& getResponse() const { return response_; }