diff --git a/include/common/bspfile_q1.hh b/include/common/bspfile_q1.hh
index 1aa29e4b..341b6ba1 100644
--- a/include/common/bspfile_q1.hh
+++ b/include/common/bspfile_q1.hh
@@ -104,6 +104,8 @@ enum q1_contents_t : int32_t
     CONTENTS_MIN = CONTENTS_SKY
 };
 
+constexpr static int BSPXBRUSHES_CONTENTS_CLIP = -8;
+
 struct bsp29_dnode_t
 {
     int32_t planenum;
diff --git a/qbsp/qbsp.cc b/qbsp/qbsp.cc
index 4560a69b..57fa62cf 100644
--- a/qbsp/qbsp.cc
+++ b/qbsp/qbsp.cc
@@ -1324,7 +1324,7 @@ static bspxbrushes_permodel BSPX_Brushes_AddModel(int modelnum, const std::vecto
             case CONTENTS_LAVA:
             case CONTENTS_SKY:
                 if (contents.is_clip(qbsp_options.target_game)) {
-                    perbrush.contents = -8;
+                    perbrush.contents = BSPXBRUSHES_CONTENTS_CLIP;
                 } else {
                     perbrush.contents = contents.native;
                 }
@@ -1334,7 +1334,7 @@ static bspxbrushes_permodel BSPX_Brushes_AddModel(int modelnum, const std::vecto
             //                      break;
             default: {
                 if (contents.is_clip(qbsp_options.target_game)) {
-                    perbrush.contents = -8;
+                    perbrush.contents = BSPXBRUSHES_CONTENTS_CLIP;
                 } else {
                     logging::print("WARNING: Unknown contents: {}. Translating to solid.\n",
                         contents.to_string(qbsp_options.target_game));
diff --git a/testmaps/q1_hull1_content_types.map b/testmaps/q1_hull1_content_types.map
index 9952f53b..f5f6c141 100644
--- a/testmaps/q1_hull1_content_types.map
+++ b/testmaps/q1_hull1_content_types.map
@@ -104,6 +104,15 @@
 ( 272 16 0 ) ( 273 16 0 ) ( 272 16 1 ) sky3 [ -1 0 0 0 ] [ 0 0 -1 -16 ] 0 1 1
 ( 272 48 0 ) ( 272 48 1 ) ( 272 49 0 ) sky3 [ 0 1 0 -32 ] [ 0 0 -1 -16 ] 0 1 1
 }
+// brush 11
+{
+( 560 16 16 ) ( 560 -16 16 ) ( 560 -16 -16 ) clip [ 0 0 -1.0000000000000002 32 ] [ 0 -1.0000000000000002 0 -64 ] 0 1 1
+( 560 -16 16 ) ( 592 -16 16 ) ( 592 -16 -16 ) clip [ 1.0000000000000002 0 0 0 ] [ 0 0 1.0000000000000002 32 ] 0 1 1
+( 592 -16 -16 ) ( 592 16 -16 ) ( 560 16 -16 ) clip [ 1 0 0 0 ] [ 0 -1 0 -64 ] 0 1 1
+( 560 16 16 ) ( 592 16 16 ) ( 592 -16 16 ) clip [ 1 0 0 0 ] [ 0 -1 0 -64 ] 0 1 1
+( 592 16 -16 ) ( 592 16 16 ) ( 560 16 16 ) clip [ 1.0000000000000002 0 0 0 ] [ 0 0 -1.0000000000000002 -32 ] 0 1 1
+( 592 -16 16 ) ( 592 16 16 ) ( 592 16 -16 ) clip [ 0 0 1.0000000000000002 96 ] [ 0 -1.0000000000000002 0 -64 ] 0 1 1
+}
 }
 // entity 1
 {
diff --git a/tests/test_qbsp.cc b/tests/test_qbsp.cc
index 680900b4..2ce7b098 100644
--- a/tests/test_qbsp.cc
+++ b/tests/test_qbsp.cc
@@ -1696,6 +1696,7 @@ TEST_CASE("q1_hull1_content_types" * doctest::test_suite("testmaps_q1"))
         {{448, -64, 0},
             {CONTENTS_EMPTY, new_leaf, CONTENTS_EMPTY}}, // func_detail_illusionary + _mirrorinside is empty in hull1
         {{512, 0, 0}, {CONTENTS_SOLID, shared_leaf_0, CONTENTS_SOLID}}, // func_detail_wall is solid in hull1
+        {{576, 0, 0}, {CONTENTS_EMPTY, new_leaf, CONTENTS_SOLID}}, // clip is empty in hull0, solid in hull1
     };
 
     for (const auto &[point, expected_types] : expected) {
@@ -2008,3 +2009,42 @@ TEST_CASE("wrbrushes + misc_external_map")
     REQUIRE(brush.bounds.maxs() == qvec3f{64,64,16});
     REQUIRE(brush.bounds.mins() == qvec3f{-64,-64,-16});
 }
+
+TEST_CASE("wrbrushes content types")
+{
+    const auto [bsp, bspx, prt] = LoadTestmap("q1_hull1_content_types.map", {"-wrbrushes"});
+
+    const bspxbrushes lump = deserialize<bspxbrushes>(bspx.at("BRUSHLIST"));
+    REQUIRE(lump.models.size() == 1);
+
+    auto &model = lump.models.at(0);
+    REQUIRE(model.numfaces == 0); // all faces are axial
+    REQUIRE(model.modelnum == 0);
+
+    const std::vector<int> expected {
+        CONTENTS_SOLID,
+        CONTENTS_SOLID,
+        CONTENTS_SOLID,
+        CONTENTS_SOLID,
+        CONTENTS_SOLID,
+        CONTENTS_SOLID,
+        CONTENTS_WATER,
+        CONTENTS_SLIME,
+        CONTENTS_LAVA,
+        CONTENTS_SOLID,
+        CONTENTS_SKY,
+        BSPXBRUSHES_CONTENTS_CLIP,
+        CONTENTS_SOLID, // detail solid in source map
+        CONTENTS_SOLID, // detail fence in source map
+        CONTENTS_SOLID, // FIXME: detail illusionary brush should be omitted
+        CONTENTS_SOLID, // detail fence in source map
+        CONTENTS_SOLID, // FIXME: detail illusionary brush should be omitted
+        CONTENTS_SOLID // detail wall in source map
+    };
+    REQUIRE(model.brushes.size() == expected.size());
+
+    for (size_t i = 0; i < expected.size(); ++i) {
+        INFO("brush ", i);
+        CHECK(expected[i] == model.brushes[i].contents);
+    }
+}