ladder

diff --git a/src/shared/navgen/nav.cpp b/src/shared/navgen/nav.cpp
index 4ff58fdf3..a42cdcad3 100644
--- a/src/shared/navgen/nav.cpp
+++ b/src/shared/navgen/nav.cpp
@@ -264,6 +264,10 @@ void NavmeshGenerator::LoadTris( std::vector<float> &verts, std::vector<int> &tr
                int firstSide = bspBrushes[i].firstSide;
                const dshader_t* brushShader = &bspShaders[bspBrushes[i].shaderNum];

+               if ( brushShader->surfaceFlags & SURF_LADDER ) {
+                       Log::Warn("found ladder surface!");
+               }
+
                if ( !( brushShader->contentFlags & solidFlags ) ) {
                        continue;
                }