diff --git a/inc/thorvg.h b/inc/thorvg.h
index e886055b..1ba5641c 100644
--- a/inc/thorvg.h
+++ b/inc/thorvg.h
@@ -230,9 +230,9 @@ enum class BlendMethod : uint8_t
 enum class SceneEffect : uint8_t
 {
     ClearAll = 0,      ///< Reset all previously applied scene effects, restoring the scene to its original state.
-    GaussianBlur,      ///< Apply a blur effect with a Gaussian filter. Param(3) = {sigma(float)[> 0], direction(int)[both: 0 / horizontal: 1 / vertical: 2], border(int)[duplicate: 0 / wrap: 1], quality(int)[0 - 100]}
+    GaussianBlur,      ///< Apply a blur effect with a Gaussian filter. Param(4) = {sigma(float)[> 0], direction(int)[both: 0 / horizontal: 1 / vertical: 2], border(int)[duplicate: 0 / wrap: 1], quality(int)[0 - 100]}
     DropShadow,        ///< Apply a drop shadow effect with a Gaussian Blur filter. Param(8) = {color_R(int)[0 - 255], color_G(int)[0 - 255], color_B(int)[0 - 255], opacity(int)[0 - 255], angle(double)[0 - 360], distance(double), blur_sigma(double)[> 0], quality(int)[0 - 100]}
-    Fill,              ///< Override the scene content color with a given fill information (Experimental API). Param(5) = {color_R(int)[0 - 255], color_G(int)[0 - 255], color_B(int)[0 - 255], opacity(int)[0 - 255]}
+    Fill,              ///< Override the scene content color with a given fill information (Experimental API). Param(4) = {color_R(int)[0 - 255], color_G(int)[0 - 255], color_B(int)[0 - 255], opacity(int)[0 - 255]}
     Tint,              ///< Tinting the current scene color with a given black, white color paramters (Experimental API). Param(7) = {black_R(int)[0 - 255], black_G(int)[0 - 255], black_B(int)[0 - 255], white_R(int)[0 - 255], white_G(int)[0 - 255], white_B(int)[0 - 255], intensity(float)[0 - 100]}
     Tritone            ///< Apply a tritone color effect to the scene using three color parameters for shadows, midtones, and highlights (Experimental API). Param(9) = {Shadow_R(int)[0 - 255], Shadow_G(int)[0 - 255], Shadow_B(int)[0 - 255], Midtone_R(int)[0 - 255], Midtone_G(int)[0 - 255], Midtone_B(int)[0 - 255], Highlight_R(int)[0 - 255], Highlight_G(int)[0 - 255], Highlight_B(int)[0 - 255]}
 };