diff --git a/clang/lib/CodeGen/CGHLSLRuntime.cpp b/clang/lib/CodeGen/CGHLSLRuntime.cpp
index 6f32136b49de5..cfdc1f68a03d8 100644
--- a/clang/lib/CodeGen/CGHLSLRuntime.cpp
+++ b/clang/lib/CodeGen/CGHLSLRuntime.cpp
@@ -270,7 +270,7 @@ castResourceShapeToResourceKind(HLSLResourceAttr::ResourceKind RK) {
       static_cast<uint32_t>(
           HLSLResourceAttr::ResourceKind::FeedbackTexture2DArray) ==
       (static_cast<uint32_t>(llvm::hlsl::ResourceKind::NumEntries) - 2));
-  return llvm::hlsl::ResourceKind::Invalid;
+  llvm_unreachable("all switch cases should be covered");
 }
 
 void CGHLSLRuntime::annotateHLSLResource(const VarDecl *D, GlobalVariable *GV) {