diff --git a/include/qbsp/map.hh b/include/qbsp/map.hh
index 23721f4d..43e84f5f 100644
--- a/include/qbsp/map.hh
+++ b/include/qbsp/map.hh
@@ -146,6 +146,8 @@ struct mapdata_t
 
     // Q2 stuff
     int32_t numareaportals = 0;
+    // running total
+    uint32_t brush_offset = 0;
 
     // misc
     int start_spots = 0;
diff --git a/qbsp/qbsp.cc b/qbsp/qbsp.cc
index 3eb35f2f..07542de5 100644
--- a/qbsp/qbsp.cc
+++ b/qbsp/qbsp.cc
@@ -196,9 +196,6 @@ static struct
     uint32_t total_leaf_brushes;
 } brush_state;
 
-// running total
-static uint32_t brush_offset;
-
 static void ExportBrushList_r(const mapentity_t *entity, node_t *node, const uint32_t &brush_offset)
 {
     if (node->planenum == PLANENUM_LEAF) {
@@ -825,7 +822,7 @@ static void ProcessEntity(mapentity_t *entity, const int hullnum)
         firstface = MakeFaceEdges(entity, nodes);
 
         if (options.target_game->id == GAME_QUAKE_II) {
-            ExportBrushList(entity, nodes, brush_offset);
+            ExportBrushList(entity, nodes, map.brush_offset);
         }
 
         ExportDrawNodes(entity, nodes, firstface);