diff --git a/lib/system/repr.nim b/lib/system/repr.nim
index 831515eb17..4e9b07c075 100644
--- a/lib/system/repr.nim
+++ b/lib/system/repr.nim
@@ -74,9 +74,9 @@ proc reprChar(x: char): string {.compilerRtl.} =
 
 proc reprEnum(e: int, typ: PNimType): string {.compilerRtl.} =
   # we read an 'int' but this may have been too large, so mask the other bits:
-  let e = if typ.size == 1: e and 0xff
-          elif typ.size == 2: e and 0xffff
-          elif typ.size == 4: e and 0xffffffff
+  let e = if typ.size == 1: int(int8(e))
+          elif typ.size == 2: int(int16(e))
+          elif typ.size == 4: int(int32(e))
           else: e
   # XXX we need a proper narrowing based on signedness here
   #e and ((1 shl (typ.size*8)) - 1)