diff --git a/test/functional/p2p_sendheaders.py b/test/functional/p2p_sendheaders.py
index c7ae57de86..7d7d251765 100755
--- a/test/functional/p2p_sendheaders.py
+++ b/test/functional/p2p_sendheaders.py
@@ -490,7 +490,7 @@ class SendHeadersTest(BitcoinTestFramework):
 
         # Now announce a header that forks the last two blocks
         tip = blocks[0].sha256
-        height -= 1
+        height -= 2
         blocks = []
 
         # Create extra blocks for later