diff --git a/src/blockvalidity.h b/src/blockvalidity.h
--- a/src/blockvalidity.h
+++ b/src/blockvalidity.h
@@ -14,10 +14,9 @@
     UNKNOWN = 0,
 
     /**
-     * Parsed, version ok, hash satisfies claimed PoW, 1 <= vtx count <= max,
-     * timestamp not in future.
+     * Reserved (was HEADER).
      */
-    HEADER = 1,
+    RESERVED = 1,
 
     /**
      * All parent headers found, difficulty matches, timestamp >= median
diff --git a/src/test/blockindex_tests.cpp b/src/test/blockindex_tests.cpp
--- a/src/test/blockindex_tests.cpp
+++ b/src/test/blockindex_tests.cpp
@@ -41,7 +41,7 @@
 BOOST_AUTO_TEST_CASE(get_disk_positions) {
     // Test against all validity values
     std::set<BlockValidity> validityValues{
-        BlockValidity::UNKNOWN, BlockValidity::HEADER,
+        BlockValidity::UNKNOWN, BlockValidity::RESERVED,
         BlockValidity::TREE,    BlockValidity::TRANSACTIONS,
         BlockValidity::CHAIN,   BlockValidity::SCRIPTS};
     for (BlockValidity validity : validityValues) {
@@ -264,7 +264,7 @@
 
     // Test against all validity values
     std::set<BlockValidity> validityValues{
-        BlockValidity::UNKNOWN, BlockValidity::HEADER,
+        BlockValidity::UNKNOWN, BlockValidity::RESERVED,
         BlockValidity::TREE,    BlockValidity::TRANSACTIONS,
         BlockValidity::CHAIN,   BlockValidity::SCRIPTS};
     std::set<bool> boolValues = {false, true};
diff --git a/src/test/blockstatus_tests.cpp b/src/test/blockstatus_tests.cpp
--- a/src/test/blockstatus_tests.cpp
+++ b/src/test/blockstatus_tests.cpp
@@ -35,7 +35,7 @@
                                  bool hasParkedParent) {
     // Check all possible permutations.
     std::set<BlockValidity> baseValidities{
-        BlockValidity::UNKNOWN, BlockValidity::HEADER,
+        BlockValidity::UNKNOWN, BlockValidity::RESERVED,
         BlockValidity::TREE,    BlockValidity::TRANSACTIONS,
         BlockValidity::CHAIN,   BlockValidity::SCRIPTS};