diff --git a/common/bspfile.cc b/common/bspfile.cc
index bc6e736f..062c2452 100644
--- a/common/bspfile.cc
+++ b/common/bspfile.cc
@@ -110,6 +110,8 @@ struct gamedef_generic_t : public gamedef_t
 
     std::string get_contents_display(const contentflags_t &) const override { throw std::bad_cast(); }
 
+    void contents_make_valid(contentflags_t &contents) const override { throw std::bad_cast(); }
+
     const std::initializer_list<aabb3d> &get_hull_sizes() const override { throw std::bad_cast(); }
 
     contentflags_t face_get_contents(const std::string &, const surfflags_t &, const contentflags_t &) const override { throw std::bad_cast(); }
@@ -457,27 +459,36 @@ public:
         }
 
         if (contents_are_clip(contents)) {
-            base += "| CLIP";
+            base += " | CLIP";
         }
         if (contents_are_origin(contents)) {
-            base += "| ORIGIN";
+            base += " | ORIGIN";
         }
     
         switch (get_data(contents).detail) {
             case detail_type_t::DETAIL:
-                base += "| DETAIL";
+                base += " | DETAIL";
                 break;
             case detail_type_t::ILLUSIONARY:
-                base += "| DETAIL[ILLUSIONARY]";
+                base += " | DETAIL[ILLUSIONARY]";
                 break;
             case detail_type_t::FENCE:
-                base += "| DETAIL[FENCE]";
+                base += " | DETAIL[FENCE]";
                 break;
         }
 
         return base;
     }
 
+    void contents_make_valid(contentflags_t &contents) const override
+    {
+        // todo: anything smarter we can do here?
+        // think this can't even happen in Q1 anyways
+        if (!contents_are_valid(contents, false)) {
+            contents = { CONTENTS_SOLID };
+        }
+    }
+
     const std::initializer_list<aabb3d> &get_hull_sizes() const
     {
         static std::initializer_list<aabb3d> hulls = {
@@ -1007,6 +1018,26 @@ struct gamedef_q2_t : public gamedef_t
         return s;
     }
 
+    void contents_make_valid(contentflags_t &contents) const override
+    {
+        if (contents_are_valid(contents, false)) {
+            return;
+        }
+
+        bool got = false;
+
+        for (int32_t i = 0; i < 8; i++) {
+            if (!got) {
+                if (contents.native & nth_bit(i)) {
+                    got = true;
+                    continue;
+                }
+            } else {
+                contents.native &= ~nth_bit(i);
+            }
+        }
+    }
+
     const std::initializer_list<aabb3d> &get_hull_sizes() const
     {
         static constexpr std::initializer_list<aabb3d> hulls = {};
@@ -1477,6 +1508,11 @@ bool contentflags_t::is_origin(const gamedef_t *game) const
     return game->contents_are_origin(*this);
 }
 
+void contentflags_t::make_valid(const gamedef_t *game)
+{
+    game->contents_make_valid(*this);
+}
+
 std::string contentflags_t::to_string(const gamedef_t *game) const
 {
     std::string s = game->get_contents_display(*this);
diff --git a/include/common/bspfile.hh b/include/common/bspfile.hh
index 441da88a..79166b60 100644
--- a/include/common/bspfile.hh
+++ b/include/common/bspfile.hh
@@ -614,6 +614,8 @@ struct contentflags_t
     bool is_clip(const gamedef_t *game) const;
     bool is_origin(const gamedef_t *game) const;
 
+    void make_valid(const gamedef_t *game);
+
     inline bool is_fence(const gamedef_t *game) const {
         return is_detail_fence(game) || is_detail_illusionary(game);
     }
@@ -1825,6 +1827,7 @@ struct gamedef_t
     virtual contentflags_t contents_remap_for_export(const contentflags_t &contents) const = 0;
     virtual contentflags_t combine_contents(const contentflags_t &a, const contentflags_t &b) const = 0;
     virtual std::string get_contents_display(const contentflags_t &contents) const = 0;
+    virtual void contents_make_valid(contentflags_t &contents) const = 0;
     virtual const std::initializer_list<aabb3d> &get_hull_sizes() const = 0;
     virtual contentflags_t face_get_contents(
         const std::string &texname, const surfflags_t &flags, const contentflags_t &contents) const = 0;
diff --git a/qbsp/map.cc b/qbsp/map.cc
index 0e4bcb0c..268fe11a 100644
--- a/qbsp/map.cc
+++ b/qbsp/map.cc
@@ -1410,25 +1410,12 @@ static void ParseTextureDef(parser_t &parser, mapface_t &mapface, const mapbrush
     tx->flags = mapface.flags = {extinfo.info->flags};
     tx->value = mapface.value = extinfo.info->value;
 
-    if (!contentflags_t{mapface.contents}.is_valid(options.target_game, false))
-    {
-        logging::print("WARNING: line {}: face has invalid contents {} ({})\n", mapface.linenum, mapface.contents.to_string(options.target_game), mapface.contents.native);
-        
-        // TODO: move into game
-        if (options.target_game->id == GAME_QUAKE_II) {
-            bool got = false;
+    contentflags_t contents { mapface.contents };
 
-            for (int i = 0; i < 8; i++) {
-                if (!got) {
-                    if (mapface.contents.native & nth_bit(i)) {
-                        got = true;
-                        continue;
-                    }
-                } else {
-                    mapface.contents.native &= ~nth_bit(i);
-                }
-            }
-        }
+    if (!contents.is_valid(options.target_game, false)) {
+        auto old_contents = contents;
+        options.target_game->contents_make_valid(contents);
+        logging::print("WARNING: line {}: face has invalid contents {}, remapped to {}\n", mapface.linenum, old_contents.to_string(options.target_game), contents.to_string(options.target_game));
     }
 
     switch (tx_type) {