diff --git a/src/m_debug_display.c b/src/m_debug_display.c
index 0d4c0aa3..3a5e3821 100644
--- a/src/m_debug_display.c
+++ b/src/m_debug_display.c
@@ -19,7 +19,7 @@ void Debug_Display_init(){
 }
 
 extern Debug_display* Debug_Display_new(f32 posX, f32 posY, f32 posZ, f32 scaleX, f32 scaleY, f32 scaleZ,
-s16 rotX, s16 rotY, s16 rotZ, s8 r, s8 g, s8 b, s8 alpha, s16 type, GRAPH* graph){
+s16 rotX, s16 rotY, s16 rotZ, u8 r, u8 g, u8 b, u8 alpha, s16 type, GRAPH* graph){
 
     Debug_display* display = debug_display;