1 files changed, 4 insertions, 0 deletions
diff --git a/source/slang/slang-emit-c-like.cpp b/source/slang/slang-emit-c-like.cpp
index b2dc9b014..26b964d6e 100644
--- a/source/slang/slang-emit-c-like.cpp
+++ b/source/slang/slang-emit-c-like.cpp
@@ -351,6 +351,10 @@ String CLikeSourceEmitter::getTargetBuiltinVarName(IRInst* inst, IRTargetBuiltin
         return "gl_InstanceIndex";
     case IRTargetBuiltinVarName::SpvBaseInstance:
         return "gl_BaseInstance";
+    case IRTargetBuiltinVarName::SpvVertexIndex:
+        return "gl_VertexIndex";
+    case IRTargetBuiltinVarName::SpvBaseVertex:
+        return "gl_BaseVertex";
     }
     if (auto linkage = inst->findDecoration<IRLinkageDecoration>())
         return linkage->getMangledName();