diff --git a/clang/utils/TableGen/NeonEmitter.cpp b/clang/utils/TableGen/NeonEmitter.cpp
--- a/clang/utils/TableGen/NeonEmitter.cpp
+++ b/clang/utils/TableGen/NeonEmitter.cpp
@@ -2353,7 +2353,6 @@
   OS << "#include <stdint.h>\n\n";
 
   OS << "#include <arm_bf16.h>\n";
-  OS << "typedef __bf16 bfloat16_t;\n";
 
   // Emit NEON-specific scalar typedefs.
   OS << "typedef float float32_t;\n";