diff --git a/compiler/semfold.nim b/compiler/semfold.nim
index caaab22912..79abfaf4dd 100644
--- a/compiler/semfold.nim
+++ b/compiler/semfold.nim
@@ -404,7 +404,7 @@ proc evalOp(m: TMagic, n, a, b, c: PNode): PNode =
      mExit, mInc, ast.mDec, mEcho, mSwap, mAppendStrCh, 
      mAppendStrStr, mAppendSeqElem, mSetLengthStr, mSetLengthSeq, 
      mParseExprToAst, mParseStmtToAst, mExpandToAst, mTypeTrait,
-     mNLen..mNError, mEqRef, mSlurp, mStaticExec, mNGenSym: 
+     mNLen..mNError, mEqRef, mSlurp, mStaticExec, mNGenSym, mSpawn:
     discard
   of mRand:
     result = newIntNodeT(math.random(a.getInt.int), n)