1 files changed, 3 insertions, 1 deletions
diff --git a/lib/DebugInfo/PDB/PDBSymbolCustom.cpp b/lib/DebugInfo/PDB/PDBSymbolCustom.cpp
index 0ea387a0eabb..9ec20bb62d75 100644
--- a/lib/DebugInfo/PDB/PDBSymbolCustom.cpp
+++ b/lib/DebugInfo/PDB/PDBSymbolCustom.cpp
@@ -20,7 +20,9 @@ using namespace llvm::pdb;
 
 PDBSymbolCustom::PDBSymbolCustom(const IPDBSession &PDBSession,
                                  std::unique_ptr<IPDBRawSymbol> CustomSymbol)
-    : PDBSymbol(PDBSession, std::move(CustomSymbol)) {}
+    : PDBSymbol(PDBSession, std::move(CustomSymbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::Custom);
+}
 
 void PDBSymbolCustom::getDataBytes(llvm::SmallVector<uint8_t, 32> &bytes) {
   RawSymbol->getDataBytes(bytes);