diff --git a/Shaders/lilium__include/colour_space.fxh b/Shaders/lilium__include/colour_space.fxh
index fba1313..a83875b 100644
--- a/Shaders/lilium__include/colour_space.fxh
+++ b/Shaders/lilium__include/colour_space.fxh
@@ -135,6 +135,7 @@ void VS_PostProcessWithoutTexCoord(
     #define CSP_OVERRIDE CSP_UNSET
   #endif
 #else
+  #undef CSP_OVERRIDE //for some reason this workaround is needed in DS1PTDE...
   #define CSP_OVERRIDE CSP_UNSET
 #endif