1 files changed, 4 insertions, 0 deletions
diff --git a/source/slang/slang-lower-to-ir.cpp b/source/slang/slang-lower-to-ir.cpp
index ef4cb98ec..fb9fc70fd 100644
--- a/source/slang/slang-lower-to-ir.cpp
+++ b/source/slang/slang-lower-to-ir.cpp
@@ -1820,6 +1820,10 @@ void addVarDecorations(
         {
             builder->addInterpolationModeDecoration(inst, IRInterpolationMode::NoInterpolation);
         }
+        else if(as<PerVertexModifier>(mod))
+        {
+            builder->addInterpolationModeDecoration(inst, IRInterpolationMode::PerVertex);
+        }
         else if(as<HLSLNoPerspectiveModifier>(mod))
         {
             builder->addInterpolationModeDecoration(inst, IRInterpolationMode::NoPerspective);