diff --git a/lib/std/sysrand.nim b/lib/std/sysrand.nim
index b5f61372a3..d57f2845e5 100644
--- a/lib/std/sysrand.nim
+++ b/lib/std/sysrand.nim
@@ -194,8 +194,7 @@ elif defined(linux) and not defined(nimNoGetRandom) and not defined(emscripten):
       elif readBytes > 0:
         inc(result, readBytes)
       else:
-        case osLastError().int
-        of EINTR, EAGAIN: discard
+        if osLastError().cint in [EINTR, EAGAIN]: discard
         else:
           result = -1
           break