diff --git a/src/lsquic/client.cr b/src/lsquic/client.cr
index d10d852..ba3ad1a 100644
--- a/src/lsquic/client.cr
+++ b/src/lsquic/client.cr
@@ -12,9 +12,13 @@ module QUIC
 
   class Client
     STREAM_READF = ->(stream_if_ctx : Void*, buf : UInt8*, buf_len : LibC::SizeT, fin : LibC::Int) do
-      stream_ctx = Box(StreamCtx).unbox(stream_if_ctx)
-      stream_ctx.io.write Slice.new(buf, buf_len)
-      buf_len
+      begin
+        stream_ctx = Box(StreamCtx).unbox(stream_if_ctx)
+        stream_ctx.io.write Slice.new(buf, buf_len)
+        buf_len
+      rescue ex
+        0_u64
+      end
     end
 
     ON_NEW_STREAM = ->(stream_if_ctx : Void*, s : LibLsquic::StreamT) do