diff --git a/lld/ELF/Options.td b/lld/ELF/Options.td
index 2afd7c32b5f2..99b94ba3cd4e 100644
--- a/lld/ELF/Options.td
+++ b/lld/ELF/Options.td
@@ -150,7 +150,7 @@ def strip_debug : Flag<["--"], "strip-debug">,
 def sysroot : Joined<["--"], "sysroot=">,
   HelpText<"Set the system root">;
 
-def threads : Joined<["--"], "threads">;
+def threads : Flag<["--"], "threads">;
 
 def trace: Flag<["--"], "trace">,
   HelpText<"Print the names of the input files">;