diff --git a/src/validation.h b/src/validation.h
--- a/src/validation.h
+++ b/src/validation.h
@@ -578,9 +578,34 @@
     friend CChainState;
 
 private:
-    // See definition for documentation
+    /**
+     * Calculate the block/rev files to delete based on height specified
+     * by user with RPC command pruneblockchain
+     */
     void FindFilesToPruneManual(std::set<int> &setFilesToPrune,
                                 int nManualPruneHeight, int chain_tip_height);
+
+    /**
+     * Prune block and undo files (blk???.dat and undo???.dat) so that the disk
+     * space used is less than a user-defined target. The user sets the target
+     * (in MB) on the command line or in config file.  This will be run on
+     * startup and whenever new space is allocated in a block or undo file,
+     * staying below the target. Changing back to unpruned requires a reindex
+     * (which in this case means the blockchain must be re-downloaded.)
+     *
+     * Pruning functions are called from FlushStateToDisk when the global
+     * fCheckForPruning flag has been set. Block and undo files are deleted in
+     * lock-step (when blk00003.dat is deleted, so is rev00003.dat.) Pruning
+     * cannot take place until the longest chain is at least a certain length
+     * (100000 on mainnet, 1000 on testnet, 1000 on regtest). Pruning will never
+     * delete a block within a defined distance (currently 288) from the active
+     * chain's tip. The block index is updated by unsetting HAVE_DATA and
+     * HAVE_UNDO for any blocks that were stored in the deleted files. A db flag
+     * records the fact that at least some block files have been pruned.
+     *
+     * @param[out]   setFilesToPrune   The set of file indices that can be
+     *                                 unlinked will be returned
+     */
     void FindFilesToPrune(std::set<int> &setFilesToPrune,
                           uint64_t nPruneAfterHeight, int chain_tip_height,
                           bool is_ibd);
diff --git a/src/validation.cpp b/src/validation.cpp
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -4585,10 +4585,6 @@
     }
 }
 
-/**
- * Calculate the block/rev files to delete based on height specified by user
- * with RPC command pruneblockchain
- */
 void BlockManager::FindFilesToPruneManual(std::set<int> &setFilesToPrune,
                                           int nManualPruneHeight,
                                           int chain_tip_height) {
@@ -4628,27 +4624,6 @@
     }
 }
 
-/**
- * Prune block and undo files (blk???.dat and undo???.dat) so that the disk
- * space used is less than a user-defined target. The user sets the target (in
- * MB) on the command line or in config file.  This will be run on startup and
- * whenever new space is allocated in a block or undo file, staying below the
- * target. Changing back to unpruned requires a reindex (which in this case
- * means the blockchain must be re-downloaded.)
- *
- * Pruning functions are called from FlushStateToDisk when the global
- * fCheckForPruning flag has been set. Block and undo files are deleted in
- * lock-step (when blk00003.dat is deleted, so is rev00003.dat.). Pruning cannot
- * take place until the longest chain is at least a certain length (100000 on
- * mainnet, 1000 on testnet, 1000 on regtest). Pruning will never delete a block
- * within a defined distance (currently 288) from the active chain's tip. The
- * block index is updated by unsetting HAVE_DATA and HAVE_UNDO for any blocks
- * that were stored in the deleted files. A db flag records the fact that at
- * least some block files have been pruned.
- *
- * @param[out]   setFilesToPrune   The set of file indices that can be unlinked
- * will be returned
- */
 void BlockManager::FindFilesToPrune(std::set<int> &setFilesToPrune,
                                     uint64_t nPruneAfterHeight,
                                     int chain_tip_height, bool is_ibd) {