diff --git a/payload_constants.cc b/payload_constants.cc
index cc18430..b831240 100644
--- a/payload_constants.cc
+++ b/payload_constants.cc
@@ -24,6 +24,7 @@
 const uint32_t kFullPayloadMinorVersion = 0;
 const uint32_t kInPlaceMinorPayloadVersion = 1;
 const uint32_t kSourceMinorPayloadVersion = 2;
+const uint32_t kOpSrcHashMinorPayloadVersion = 3;
 
 const char kLegacyPartitionNameKernel[] = "boot";
 const char kLegacyPartitionNameRoot[] = "system";