diff --git a/src/hyperx/frame.nim b/src/hyperx/frame.nim
index bf81227..d2ddd43 100644
--- a/src/hyperx/frame.nim
+++ b/src/hyperx/frame.nim
@@ -214,4 +214,3 @@ func toString*(frm: Frame, payload: seq[byte]): string =
   else:
     result.add "\nUnimplemented debug"
   result.add "\n============="
-  
diff --git a/src/hyperx/stream.nim b/src/hyperx/stream.nim
index 54eb8d0..5d5862e 100644
--- a/src/hyperx/stream.nim
+++ b/src/hyperx/stream.nim
@@ -48,7 +48,6 @@ const frmRecvAllowed* = {
 # Section 5.1
 func toNextStateRecv*(s: StreamState, e: StreamEvent): StreamState =
   doAssert e in eventRecvAllowed
-  # XXX: seDataRecv ???
   case s
   of strmIdle:
     case e:
@@ -196,6 +195,7 @@ when isMainModule:
       doAssert toNextStateRecv(strmIdle, ev) == strmInvalid
     doAssert toNextStateRecv(strmOpen, seEndStreamRecv) == strmHalfClosedRemote
     doAssert toNextStateRecv(strmOpen, seRstStream) == strmClosed
+    doAssert toNextStateRecv(strmOpen, seDataRecv) == strmOpen
     for ev in eventRecvAllowed-{seEndStreamRecv, seRstStream}:
       doAssert toNextStateRecv(strmOpen, ev) == strmOpen
     doAssert toNextStateRecv(strmClosed, sePriorityRecv) == strmClosed
@@ -211,6 +211,7 @@ when isMainModule:
       doAssert toNextStateRecv(strmReservedRemote, ev) == strmInvalid
     doAssert toNextStateRecv(strmHalfClosedLocal, seEndStreamRecv) == strmClosed
     doAssert toNextStateRecv(strmHalfClosedLocal, seRstStream) == strmClosed
+    doAssert toNextStateRecv(strmHalfClosedLocal, seDataRecv) == strmHalfClosedLocal
     for ev in eventRecvAllowed-{seEndStreamRecv,seRstStream}:
       doAssert toNextStateRecv(strmHalfClosedLocal, ev) == strmHalfClosedLocal
     doAssert toNextStateRecv(strmHalfClosedRemote, seRstStream) == strmClosed