diff --git a/libraries/liblmdb/CHANGES b/libraries/liblmdb/CHANGES
index da4e5ce5f4..6d32dc9daf 100644
--- a/libraries/liblmdb/CHANGES
+++ b/libraries/liblmdb/CHANGES
@@ -8,6 +8,7 @@ LMDB 0.9.15 Release Engineering
 	Fix mdb_load with large values (ITS#8066)
 	Fix to retry writes on EINTR (ITS#8106)
 	Fix mdb_cursor_del on empty DB (ITS#8109)
+	Fix MDB_INTEGERDUP key compare (ITS#8117)
 	Added workaround for fdatasync bug in ext3fs
 	Build
 		Don't use -fPIC for static lib
diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index fe651509f8..19705a0618 100644
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -7076,13 +7076,15 @@ mdb_xcursor_init1(MDB_cursor *mc, MDB_node *node)
 				mx->mx_db.md_flags |= MDB_INTEGERKEY;
 		}
 	}
+#if UINT_MAX < SIZE_MAX
+	if (mc->mc_dbx->md_dcmp == mdb_cmp_int && mx->mx_db.md_pad == sizeof(size_t)) {
+		mc->mc_dbx->md_dcmp = mdb_cmp_clong;
+		mx->mx_dbx.md_cmp = mdb_cmp_clong;
+	}
+#endif
 	DPRINTF(("Sub-db -%u root page %"Z"u", mx->mx_cursor.mc_dbi,
 		mx->mx_db.md_root));
 	mx->mx_dbflag = DB_VALID|DB_DIRTY; /* DB_DIRTY guides mdb_cursor_touch */
-#if UINT_MAX < SIZE_MAX
-	if (mx->mx_dbx.md_cmp == mdb_cmp_int && mx->mx_db.md_pad == sizeof(size_t))
-		mx->mx_dbx.md_cmp = mdb_cmp_clong;
-#endif
 }
 
 /** Initialize a cursor for a given transaction and database. */