diff --git a/crystal/src/fromipc.cr b/crystal/src/fromipc.cr
index e2d9447..e411eec 100644
--- a/crystal/src/fromipc.cr
+++ b/crystal/src/fromipc.cr
@@ -1,4 +1,7 @@
 # Read an IPC network packet and remove the first 4 bytes.
 buffer = Bytes.new 1_000_000
-len = STDIN.read buffer
-STDOUT.write buffer[4.. len -1]
+while true
+	len = STDIN.read buffer
+	break if len == 0
+	STDOUT.write buffer[4.. len -1]
+end
diff --git a/crystal/src/input2ipc.cr b/crystal/src/input2ipc.cr
index 80f9455..cbd4fb8 100644
--- a/crystal/src/input2ipc.cr
+++ b/crystal/src/input2ipc.cr
@@ -2,6 +2,7 @@
 buffer = Bytes.new 1_000_000
 while true
 	len = STDIN.read buffer
+	break if len == 0
 	STDOUT.write_bytes len, IO::ByteFormat::BigEndian
 	STDOUT.write buffer[0.. len -1]
 end