diff --git a/src/gui/gui.h b/src/gui/gui.h
index da476fc3a..90ffd64fb 100644
--- a/src/gui/gui.h
+++ b/src/gui/gui.h
@@ -295,6 +295,7 @@ enum FurnaceGUIColors {
   GUI_COLOR_INSTR_POWERNOISE,
   GUI_COLOR_INSTR_POWERNOISE_SLOPE,
   GUI_COLOR_INSTR_DAVE,
+  GUI_COLOR_INSTR_NDS,
   GUI_COLOR_INSTR_GBA_DMA,
   GUI_COLOR_INSTR_GBA_MINMOD,
   GUI_COLOR_INSTR_UNKNOWN,