diff --git a/llvm/lib/MC/MCParser/MasmParser.cpp b/llvm/lib/MC/MCParser/MasmParser.cpp
--- a/llvm/lib/MC/MCParser/MasmParser.cpp
+++ b/llvm/lib/MC/MCParser/MasmParser.cpp
@@ -2125,20 +2125,6 @@
     // Treat '.' as a valid identifier in this context.
     Lex();
     IDVal = ".";
-  } else if (Lexer.is(AsmToken::LCurly)) {
-    // Treat '{' as a valid identifier in this context.
-    Lex();
-    IDVal = "{";
-
-  } else if (Lexer.is(AsmToken::RCurly)) {
-    // Treat '}' as a valid identifier in this context.
-    Lex();
-    IDVal = "}";
-  } else if (Lexer.is(AsmToken::Star) &&
-             getTargetParser().starIsStartOfStatement()) {
-    // Accept '*' as a valid start of statement.
-    Lex();
-    IDVal = "*";
   } else if (Lexer.is(AsmToken::Real)) {
     // Treat ".<number>" as a valid identifier in this context.
     IDVal = getTok().getString();
diff --git a/llvm/test/tools/llvm-ml/label_errors.asm b/llvm/test/tools/llvm-ml/label_errors.asm
new file mode 100644
--- /dev/null
+++ b/llvm/test/tools/llvm-ml/label_errors.asm
@@ -0,0 +1,8 @@
+; RUN: not llvm-ml -filetype=s %s /Fo - 2>&1 \
+; RUN:   | FileCheck %s --implicit-check-not="{{[0-9]+:[0-9]+: error:}}"
+
+.code
+
+; These used to be valid label names.
+{: ; CHECK: [[@LINE]]:1: error: unexpected token at start of statement
+}: ; CHECK: [[@LINE]]:1: error: unexpected token at start of statement