diff --git a/llvm/lib/Support/YAMLTraits.cpp b/llvm/lib/Support/YAMLTraits.cpp
index 3b4bb7d..38f3ec7 100644
--- a/llvm/lib/Support/YAMLTraits.cpp
+++ b/llvm/lib/Support/YAMLTraits.cpp
@@ -561,11 +561,8 @@
     this->outputUpToEndOfLine("''");
     return;
   }
-  bool isOctalString = S.front() == '0' &&
-                       S.find_first_not_of('0') != StringRef::npos &&
-                       !S.startswith_lower("0x");
   if (S.find_first_not_of(ScalarSafeChars) == StringRef::npos &&
-      !isspace(S.front()) && !isspace(S.back()) && !isOctalString) {
+      !isspace(S.front()) && !isspace(S.back())) {
     // If the string consists only of safe characters, print it out without
     // quotes.
     this->outputUpToEndOfLine(S);