diff --git a/beacon_chain/networking/eth2_network.nim b/beacon_chain/networking/eth2_network.nim
index 01249429e..dc3230b12 100644
--- a/beacon_chain/networking/eth2_network.nim
+++ b/beacon_chain/networking/eth2_network.nim
@@ -720,7 +720,7 @@ proc uncompressFramedStream(conn: Connection,
     doAssert maxCompressedFrameDataLen >= maxUncompressedFrameDataLen.uint64
 
   var
-    frameData = newSeq[byte](maxCompressedFrameDataLen + 4)
+    frameData = newSeqUninitialized[byte](maxCompressedFrameDataLen + 4)
     output = newSeqUninitialized[byte](expectedSize)
     written = 0