diff --git a/src/client/refresh/gl1/gl1_surf.c b/src/client/refresh/gl1/gl1_surf.c
index 25050188..6b6c0ffd 100644
--- a/src/client/refresh/gl1/gl1_surf.c
+++ b/src/client/refresh/gl1/gl1_surf.c
@@ -1143,9 +1143,9 @@ R_GetBrushesLighting(void)
 		for (k = 0; k < currentmodel->nummodelsurfaces; k++, surf++)
 		{
 			if (surf->texinfo->flags & (SURF_TRANS33 | SURF_TRANS66 | SURF_WARP)
-				|| surf->flags & SURF_DRAWTURB)
+				|| surf->flags & SURF_DRAWTURB || surf->lmchain_frame == r_framecount)
 			{
-				continue;
+				continue;	// either not affected by light, or already in the chain
 			}
 
 			// find which side of the node we are on
@@ -1155,6 +1155,7 @@ R_GetBrushesLighting(void)
 			if (((surf->flags & SURF_PLANEBACK) && (dot < -BACKFACE_EPSILON)) ||
 				(!(surf->flags & SURF_PLANEBACK) && (dot > BACKFACE_EPSILON)))
 			{
+				surf->lmchain_frame = r_framecount;	// don't add this twice to the chain
 				surf->lightmapchain = gl_lms.lightmap_surfaces[surf->lightmaptexturenum];
 				gl_lms.lightmap_surfaces[surf->lightmaptexturenum] = surf;
 			}
diff --git a/src/client/refresh/gl1/header/model.h b/src/client/refresh/gl1/header/model.h
index 2eda331d..43b296ec 100644
--- a/src/client/refresh/gl1/header/model.h
+++ b/src/client/refresh/gl1/header/model.h
@@ -59,6 +59,7 @@ typedef struct msurface_s
 	glpoly_t *polys;                /* multiple if warped */
 	struct  msurface_s *texturechain;
 	struct  msurface_s *lightmapchain;
+	int lmchain_frame;	// avoids adding this surface twice to the lightmap chain
 
 	mtexinfo_t *texinfo;