diff --git a/src/common/rendering/hwrenderer/data/hw_skydome.cpp b/src/common/rendering/hwrenderer/data/hw_skydome.cpp
index cd8807b134..3c2b903fd9 100644
--- a/src/common/rendering/hwrenderer/data/hw_skydome.cpp
+++ b/src/common/rendering/hwrenderer/data/hw_skydome.cpp
@@ -178,6 +178,8 @@ void FSkyVertexBuffer::SkyVertexDoom(int r, int c, bool zflip)
 	vert.y = z - 1.f;
 	vert.z = pos.Y;
 
+	vert.lindex = -1;
+
 	mVertices.Push(vert);
 }
 
@@ -210,6 +212,8 @@ void FSkyVertexBuffer::SkyVertexBuild(int r, int c, bool zflip)
 	vert.y = z - 1.f;
 	vert.z = pos.Y;
 
+	vert.lindex = -1;
+
 	mVertices.Push(vert);
 }