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-rw-r--r--compiler/ccgexprs.nim2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/ccgexprs.nim b/compiler/ccgexprs.nim
index fcedcf001..d8f5d016b 100644
--- a/compiler/ccgexprs.nim
+++ b/compiler/ccgexprs.nim
@@ -2156,7 +2156,7 @@ proc genMagicExpr(p: BProc, e: PNode, d: var TLoc, op: TMagic) =
     const opr: array[mInc..mDec, string] = ["+=", "-="]
     const fun64: array[mInc..mDec, string] = ["nimAddInt64", "nimSubInt64"]
     const fun: array[mInc..mDec, string] = ["nimAddInt","nimSubInt"]
-    let underlying = skipTypes(e[1].typ, {tyGenericInst, tyAlias, tySink, tyVar, tyLent, tyRange})
+    let underlying = skipTypes(e[1].typ, {tyGenericInst, tyAlias, tySink, tyVar, tyLent, tyRange, tyDistinct})
     if optOverflowCheck notin p.options or underlying.kind in {tyUInt..tyUInt64}:
       binaryStmt(p, e, d, opr[op])
     else: