diff --git a/inc/thorvg.h b/inc/thorvg.h
index 9e8b1855..702592dc 100644
--- a/inc/thorvg.h
+++ b/inc/thorvg.h
@@ -1258,7 +1258,7 @@ public:
      * @param[in] policy The method specifying the Memory Pool behavior. The default value is @c MempoolPolicy::Default.
      *
      * @retval Result::Success When succeed.
-     * @retval Result::InsufficientCondition If the canvas has no paints.
+     * @retval Result::InsufficientCondition If the canvas contains some paints already.
      * @retval Result::NonSupport In case the software engine is not supported.
      *
      * @note When @c policy is set as @c MempoolPolicy::Individual, the current instance of canvas uses its own individual
diff --git a/src/bindings/capi/thorvg_capi.h b/src/bindings/capi/thorvg_capi.h
index 41b49616..d42e22a8 100644
--- a/src/bindings/capi/thorvg_capi.h
+++ b/src/bindings/capi/thorvg_capi.h
@@ -372,7 +372,7 @@ TVG_EXPORT Tvg_Canvas* tvg_swcanvas_create();
 * \return Tvg_Result enumeration.
 * \retval TVG_RESULT_SUCCESS Succeed.
 * \retval TVG_RESULT_MEMORY_CORRUPTION Casting in the internal function implementation failed.
-* \retval TVG_RESULT_INVALID_ARGUMENTS An invalid buffer pointer passed or one of the @p stride, @p w or @p h being zero.
+* \retval TVG_RESULT_INVALID_ARGUMENTS An invalid canvas or buffer pointer passed or one of the @p stride, @p w or @p h being zero.
 * \retval TVG_RESULT_NOT_SUPPORTED The software engine is not supported.
 *
 * \warning Do not access @p buffer during tvg_canvas_draw() - tvg_canvas_sync(). It should not be accessed while TVG is writing on it.