diff --git a/llvm/lib/AsmParser/LLParser.cpp b/llvm/lib/AsmParser/LLParser.cpp
index 769601c7e633..adeb3ba15a92 100644
--- a/llvm/lib/AsmParser/LLParser.cpp
+++ b/llvm/lib/AsmParser/LLParser.cpp
@@ -4167,8 +4167,8 @@ bool LLParser::parseMDField(LocTy Loc, StringRef Name, DIFlagField &Result) {
 
     Val = DINode::getFlag(Lex.getStrVal());
     if (!Val)
-      return tokError(Twine("invalid debug info flag flag '") +
-                      Lex.getStrVal() + "'");
+      return tokError(Twine("invalid debug info flag '") + Lex.getStrVal() +
+                      "'");
     Lex.Lex();
     return false;
   };
diff --git a/llvm/test/Assembler/invalid-diflag-bad.ll b/llvm/test/Assembler/invalid-diflag-bad.ll
new file mode 100644
index 000000000000..cde59f6ce667
--- /dev/null
+++ b/llvm/test/Assembler/invalid-diflag-bad.ll
@@ -0,0 +1,4 @@
+; RUN: not llvm-as < %s -disable-output 2>&1 | FileCheck %s
+
+; CHECK: <stdin>:[[@LINE+1]]:27: error: invalid debug info flag 'DIFlagUnknown'
+!0 = !DISubprogram(flags: DIFlagUnknown)