diff --git a/machine_learning/kohonen_som_trace.c b/machine_learning/kohonen_som_trace.c
index d0415e9f..5c6f885a 100644
--- a/machine_learning/kohonen_som_trace.c
+++ b/machine_learning/kohonen_som_trace.c
@@ -449,7 +449,7 @@ void test3()
  * Convert clock cycle difference to time in seconds
  *
  * \param[in] start_t start clock
- * \param[in] start_t end clock
+ * \param[in] end_t end clock
  * \returns time difference in seconds
  */
 double get_clock_diff(clock_t start_t, clock_t end_t)