diff --git a/lib/impure/rdstdin.nim b/lib/impure/rdstdin.nim
index 935c83671f..b0c648373d 100644
--- a/lib/impure/rdstdin.nim
+++ b/lib/impure/rdstdin.nim
@@ -22,8 +22,6 @@ runnableExamples("-r:off"):
     if line.len > 0: echo line
   echo "exiting"
 
-when defined(nimPreviewSlimSystem):
-  import std/syncio
 
 when defined(windows):
   when defined(nimPreviewSlimSystem):