diff --git a/src/versionbits.h b/src/versionbits.h
index cdc947cd9e..9304c90556 100644
--- a/src/versionbits.h
+++ b/src/versionbits.h
@@ -9,7 +9,7 @@
 #include <map>
 
 /** What block version to use for new blocks (pre versionbits) */
-static const int32_t VERSIONBITS_LAST_OLD_BLOCK_VERSION = 4;
+static const int32_t VERSIONBITS_LAST_OLD_BLOCK_VERSION = 5;
 /** What bits to set in version for versionbits blocks */
 static const int32_t VERSIONBITS_TOP_BITS = 0x20000000UL;
 /** What bitmask determines whether versionbits is in use */