Match declaration to definition.

llvm-svn: 75454
diff --git a/llvm/lib/CodeGen/MachOWriter.h b/llvm/lib/CodeGen/MachOWriter.h
index 3067ff1..e8e57934 100644
--- a/llvm/lib/CodeGen/MachOWriter.h
+++ b/llvm/lib/CodeGen/MachOWriter.h
@@ -27,7 +27,7 @@
   class MachODySymTab;
   class MachOHeader;
   class MachOSection;
-  class MachOSym;
+  struct MachOSym;
   class TargetData;
   class TargetMachine;
   class TargetAsmInfo;