diff --git a/src/SpriteRenderer.cpp b/src/SpriteRenderer.cpp
index b26fe88..6b9678c 100644
--- a/src/SpriteRenderer.cpp
+++ b/src/SpriteRenderer.cpp
@@ -473,13 +473,16 @@ uint8_t* SpriteRenderer::draw(const uint8_t* spriteBuffer, OutputFormat format,
     {
         case OutputFormat::RGB:
             rgbPalette = convertGBColorPaletteToRGB24(palette);
+            rgba16Palette = nullptr;
             numColorComponents = 3;
             break;
         case OutputFormat::RGBA32:
             rgbPalette = convertGBColorPaletteToRGB24(palette);
+            rgba16Palette = nullptr;
             numColorComponents = 4;
             break;
         case OutputFormat::RGBA16:
+            rgbPalette = nullptr;
             rgba16Palette = convertGBColorPaletteToRGBA16(palette);
             numColorComponents = 2;
             break;
diff --git a/src/utils.cpp b/src/utils.cpp
index b462a85..be1b275 100644
--- a/src/utils.cpp
+++ b/src/utils.cpp
@@ -243,6 +243,7 @@ bool write_png(const char *filename, unsigned char *rgb_data, int width, int hei
 	(void)rgb_data;
 	(void)width;
 	(void)height;
+    (void)hasAlpha;
 	
 	fprintf(stderr, "Error: Can't write %s! PNG support was not enabled at build time!\n", filename);
 	return false;