diff --git a/src/stream-tcp-reassemble.c b/src/stream-tcp-reassemble.c
index 01306a802e..670182111c 100644
--- a/src/stream-tcp-reassemble.c
+++ b/src/stream-tcp-reassemble.c
@@ -930,7 +930,7 @@ static inline bool GapAhead(TcpStream *stream, StreamingBufferBlock *cur_blk)
 {
     StreamingBufferBlock *nblk = SBB_RB_NEXT(cur_blk);
     if (nblk && (cur_blk->offset + cur_blk->len < nblk->offset) &&
-            GetAbsLastAck(stream) >= (cur_blk->offset + cur_blk->len)) {
+            GetAbsLastAck(stream) > (cur_blk->offset + cur_blk->len)) {
         return true;
     }
     return false;