diff --git a/src/app/gfx/bitmap.cc b/src/app/gfx/bitmap.cc
index c65b168d..0d00bba3 100644
--- a/src/app/gfx/bitmap.cc
+++ b/src/app/gfx/bitmap.cc
@@ -59,7 +59,8 @@ void Bitmap::Create(int width, int height, int depth, int size) {
   surface_->pixels = pixel_data_;
 }
 
-void Bitmap::Create(int width, int height, int depth, uchar *data, int size, const SNESPalette &palette) {
+void Bitmap::Create(int width, int height, int depth, uchar *data, int size,
+                    SNESPalette &palette) {
   width_ = width;
   height_ = height;
   depth_ = depth;
diff --git a/src/app/gfx/bitmap.h b/src/app/gfx/bitmap.h
index f3f3ea39..1c696f48 100644
--- a/src/app/gfx/bitmap.h
+++ b/src/app/gfx/bitmap.h
@@ -19,7 +19,8 @@ class Bitmap {
 
   void Create(int width, int height, int depth, uchar *data);
   void Create(int width, int height, int depth, int data_size);
-  void Create(int width, int height, int depth, uchar *data, int size, const SNESPalette &palette);
+  void Create(int width, int height, int depth, uchar *data, int size,
+              SNESPalette &palette);
   void CreateTexture(std::shared_ptr<SDL_Renderer> renderer);
 
   void ApplyPalette(const SNESPalette &palette);