diff --git a/src/actor.h b/src/actor.h
index 893e9cb57..83c0fa37b 100644
--- a/src/actor.h
+++ b/src/actor.h
@@ -533,6 +533,7 @@ enum ActorRenderFeatureFlag
 	RFF_COLORMAP		= 1<<9, // custom colormaps (incl. ability to fullbright certain ranges, ala Strife)
 	RFF_POLYGONAL		= 1<<10, // uses polygons instead of wallscans/visplanes (i.e. softpoly and hardware opengl)
 	RFF_TRUECOLOR		= 1<<11, // renderer is currently truecolor
+	RFF_VOXELS		= 1<<12, // renderer is capable of voxels
 };
 
 // [TP] Flagset definitions
diff --git a/wadsrc/static/zscript/constants.txt b/wadsrc/static/zscript/constants.txt
index 05f373f69..d6bc27248 100644
--- a/wadsrc/static/zscript/constants.txt
+++ b/wadsrc/static/zscript/constants.txt
@@ -1189,5 +1189,6 @@ enum ActorRenderFeatureFlag
 	RFF_COLORMAP		= 1<<9, // custom colormaps (incl. ability to fullbright certain ranges, ala Strife)
 	RFF_POLYGONAL		= 1<<10, // uses polygons instead of wallscans/visplanes (i.e. softpoly and hardware opengl)
 	RFF_TRUECOLOR		= 1<<11, // renderer is currently truecolor
+	RFF_VOXELS		= 1<<12, // renderer is capable of voxels
 };