1 files changed, 2 insertions, 1 deletions
diff --git a/source/slang/slang-check-decl.cpp b/source/slang/slang-check-decl.cpp
index e4206827f..4a4ade047 100644
--- a/source/slang/slang-check-decl.cpp
+++ b/source/slang/slang-check-decl.cpp
@@ -8789,7 +8789,8 @@ void SemanticsDeclHeaderVisitor::checkMeshOutputDecl(VarDeclBase* varDecl)
         nullptr,
         ConstantFoldingKind::LinkTime,
         getSink());
-
+    if (!index)
+        return;
     Type* d = m_astBuilder->getMeshOutputTypeFromModifier(modifier, base, index);
     varDecl->type.type = d;
 }