diff --git a/inc/thorvg.h b/inc/thorvg.h
index 17d935ff..f37650dc 100644
--- a/inc/thorvg.h
+++ b/inc/thorvg.h
@@ -358,7 +358,7 @@ public:
      *
      * @note Experimental API
      */
-    Result blend(BlendMethod method) const noexcept;
+    Result blend(BlendMethod method) noexcept;
 
     /**
      * @brief Gets the axis-aligned bounding box of the paint object.
@@ -404,9 +404,9 @@ public:
     CompositeMethod composite(const Paint** target) const noexcept;
 
     /**
-     * @brief Gets the blending method of the object.
+     * @brief Retrieves the current blending method applied to the paint object.
      *
-     * @return The blending method
+     * @return The currently set blending method.
      *
      * @note Experimental API
      */
diff --git a/src/bindings/capi/thorvg_capi.h b/src/bindings/capi/thorvg_capi.h
index aafa6ea4..74c17533 100644
--- a/src/bindings/capi/thorvg_capi.h
+++ b/src/bindings/capi/thorvg_capi.h
@@ -1029,7 +1029,7 @@ TVG_DEPRECATED TVG_API Tvg_Result tvg_paint_get_identifier(const Tvg_Paint* pain
  *
  * @note Experimental API
  */
-TVG_API Tvg_Result tvg_paint_set_blend_method(const Tvg_Paint* paint, Tvg_Blend_Method method);
+TVG_API Tvg_Result tvg_paint_set_blend_method(Tvg_Paint* paint, Tvg_Blend_Method method);
 
 
 /**
diff --git a/src/bindings/capi/tvgCapi.cpp b/src/bindings/capi/tvgCapi.cpp
index 05988020..619a9993 100644
--- a/src/bindings/capi/tvgCapi.cpp
+++ b/src/bindings/capi/tvgCapi.cpp
@@ -237,10 +237,10 @@ TVG_API Tvg_Result tvg_paint_get_composite_method(const Tvg_Paint* paint, const
 }
 
 
-TVG_API Tvg_Result tvg_paint_set_blend_method(const Tvg_Paint* paint, Tvg_Blend_Method method)
+TVG_API Tvg_Result tvg_paint_set_blend_method(Tvg_Paint* paint, Tvg_Blend_Method method)
 {
    if (!paint) return TVG_RESULT_INVALID_ARGUMENT;
-   return (Tvg_Result) reinterpret_cast<const Paint*>(paint)->blend((BlendMethod)method);
+   return (Tvg_Result) reinterpret_cast<Paint*>(paint)->blend((BlendMethod)method);
 }
 
 
diff --git a/src/renderer/tvgPaint.cpp b/src/renderer/tvgPaint.cpp
index c8402bcf..6d6361ce 100644
--- a/src/renderer/tvgPaint.cpp
+++ b/src/renderer/tvgPaint.cpp
@@ -482,7 +482,7 @@ TVG_DEPRECATED uint32_t Paint::identifier() const noexcept
 }
 
 
-Result Paint::blend(BlendMethod method) const noexcept
+Result Paint::blend(BlendMethod method) noexcept
 {
     if (pImpl->blendMethod != method) {
         pImpl->blendMethod = method;