diff --git a/include/rocksdb/c.h b/include/rocksdb/c.h
index 899ad1c17..bd5c988db 100644
--- a/include/rocksdb/c.h
+++ b/include/rocksdb/c.h
@@ -658,6 +658,8 @@ extern ROCKSDB_LIBRARY_API void rocksdb_options_prepare_for_bulk_load(
     rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_memtable_vector_rep(
     rocksdb_options_t*);
+extern ROCKSDB_LIBRARY_API void rocksdb_options_set_memtable_prefix_bloom_size_ratio(
+    rocksdb_options_t*, double);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_max_compaction_bytes(
     rocksdb_options_t*, uint64_t);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_hash_skip_list_rep(