diff --git a/hecl/extern/boo b/hecl/extern/boo
index 5b43b3152..23f49fcc1 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit 5b43b31529447482add3a441596910db16e0ce4c
+Subproject commit 23f49fcc19f2ef2be2e272ba00bfed863eaea423
diff --git a/hecl/lib/Backend/HLSL.cpp b/hecl/lib/Backend/HLSL.cpp
index f2b815bdd..d88dd4cba 100644
--- a/hecl/lib/Backend/HLSL.cpp
+++ b/hecl/lib/Backend/HLSL.cpp
@@ -167,7 +167,7 @@ std::string HLSL::makeFrag(const ShaderFunction& lighting) const
     if (m_lighting)
     {
         if (lighting.m_entry)
-            retval += hecl::Format("    float4 lighting = %s();\n", lighting.m_entry);
+            retval += hecl::Format("    float4 lighting = %s(vtf.mvPos, vtf.mvNorm);\n", lighting.m_entry);
         else
             retval += "    float4 lighting = float4(1.0,1.0,1.0,1.0);\n";
     }
@@ -215,7 +215,7 @@ std::string HLSL::makeFrag(const ShaderFunction& lighting,
     if (m_lighting)
     {
         if (lighting.m_entry)
-            retval += hecl::Format("    float4 lighting = %s();\n", lighting.m_entry);
+            retval += hecl::Format("    float4 lighting = %s(vtf.mvPos, vtf.mvNorm);\n", lighting.m_entry);
         else
             retval += "    float4 lighting = float4(1.0,1.0,1.0,1.0);\n";
     }