diff --git a/compiler/sighashes.nim b/compiler/sighashes.nim
index ffe614efc8..e7737e44ae 100644
--- a/compiler/sighashes.nim
+++ b/compiler/sighashes.nim
@@ -224,6 +224,7 @@ proc hashType(c: var MD5Context, t: PType; flags: set[ConsiderFlag]) =
     if CoType notin flags:
       if tfNoSideEffect in t.flags: c &= ".noSideEffect"
       if tfThread in t.flags: c &= ".thread"
+    if tfVarargs in t.flags: c &= ".varargs"
   else:
     for i in 0.. <t.len: c.hashType(t.sons[i], flags)
   if tfNotNil in t.flags and CoType notin flags: c &= "not nil"