diff --git a/src/platform/sdl/gl-sdl.c b/src/platform/sdl/gl-sdl.c
index 66d46b0c9..0a0d73e21 100644
--- a/src/platform/sdl/gl-sdl.c
+++ b/src/platform/sdl/gl-sdl.c
@@ -59,7 +59,7 @@ bool GBASDLInit(struct SDLSoftwareRenderer* renderer) {
 #endif
 #endif
 
-	renderer->d.outputBuffer = malloc(VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * 4);
+	renderer->d.outputBuffer = malloc(VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * BYTES_PER_PIXEL);
 	renderer->d.outputBufferStride = VIDEO_HORIZONTAL_PIXELS;
 	glGenTextures(1, &renderer->tex);
 	glBindTexture(GL_TEXTURE_2D, renderer->tex);