diff --git a/base/materials/_tb_helpers.mtr b/base/materials/_tb_helpers.mtr
index f6a5742d..803ce95d 100644
--- a/base/materials/_tb_helpers.mtr
+++ b/base/materials/_tb_helpers.mtr
@@ -1,6 +1,6 @@
 
 // RB: map TrenchBroom's default material to textures/base_wall/snpanel2rust so users have properly sealed maps
-__TB_empty
+textures/__TB_empty
 {
 	qer_editorimage	textures/base_wall/snpanel2rust.tga
 	bumpmap			textures/base_wall/snpanel2_local.tga