diff --git a/llvm/tools/llvm-nm/llvm-nm.cpp b/llvm/tools/llvm-nm/llvm-nm.cpp
index 29836da1fcd7..b25c4775e8d8 100644
--- a/llvm/tools/llvm-nm/llvm-nm.cpp
+++ b/llvm/tools/llvm-nm/llvm-nm.cpp
@@ -672,7 +672,7 @@ static Optional<std::string> demangle(StringRef Name, bool StripUnderscore) {
     return None;
 
   int Status;
-  std::unique_ptr<char> Undecorated(
+  std::unique_ptr<char[]> Undecorated(
       itaniumDemangle(Name.str().c_str(), nullptr, nullptr, &Status));
   if (Status != 0)
     return None;