diff --git a/llvm/lib/MC/MCAsmStreamer.cpp b/llvm/lib/MC/MCAsmStreamer.cpp
--- a/llvm/lib/MC/MCAsmStreamer.cpp
+++ b/llvm/lib/MC/MCAsmStreamer.cpp
@@ -788,7 +788,7 @@
 }
 
 void MCAsmStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {
-  OS << "\t.def\t ";
+  OS << "\t.def\t";
   Symbol->print(OS, MAI);
   OS << ';';
   EmitEOL();