diff --git a/src/wallet/coinselection.cpp b/src/wallet/coinselection.cpp
--- a/src/wallet/coinselection.cpp
+++ b/src/wallet/coinselection.cpp
@@ -345,13 +345,13 @@
     m_from_me &= from_me;
     m_value += output.effective_value;
     m_depth = std::min(m_depth, depth);
-    // m_ancestors is currently the max ancestor count for all coins in the
-    // group; however, this is not ideal, as a wallet will consider e.g. thirty
-    // 2-ancestor coins as having two ancestors, when in reality it has 60
-    // ancestors.
-    m_ancestors = std::max(m_ancestors, ancestors);
-    // m_descendants is the count as seen from the top ancestor, not the
-    // descendants as seen from the coin itself; thus, this value is accurate
+    // ancestors here express the number of ancestors the new coin will end up
+    // having, which is the sum, rather than the max; this will overestimate in
+    // the cases where multiple inputs have common ancestors
+    m_ancestors += ancestors;
+    // descendants is the count as seen from the top ancestor, not the
+    // descendants as seen from the coin itself; thus, this value is counted as
+    // the max, not the sum
     m_descendants = std::max(m_descendants, descendants);
     effective_value = m_value;
 }