Index: dll/win32/dbghelp/symbol.c
===================================================================
--- dll/win32/dbghelp/symbol.c	(revision 62704)
+++ dll/win32/dbghelp/symbol.c	(working copy)
@@ -703,8 +703,8 @@
     if (sym_info->MaxNameLen)
     {
         if (sym->tag != SymTagPublicSymbol || !(dbghelp_options & SYMOPT_UNDNAME) ||
-            (sym_info->NameLen = UnDecorateSymbolName(name, sym_info->Name,
-                                                      sym_info->MaxNameLen, UNDNAME_NAME_ONLY) == 0))
+            ((sym_info->NameLen = UnDecorateSymbolName(name, sym_info->Name,
+                                                      sym_info->MaxNameLen, UNDNAME_NAME_ONLY)) == 0))
         {
             sym_info->NameLen = min(strlen(name), sym_info->MaxNameLen - 1);
             memcpy(sym_info->Name, name, sym_info->NameLen);