diff --git a/src/options.rs b/src/options.rs
index cc14ec2..693537e 100644
--- a/src/options.rs
+++ b/src/options.rs
@@ -2219,7 +2219,7 @@ impl DBOptions {
     /// Not supported in ROCKSDB_LITE mode!
     ///
     /// Rust: will move in and use share_ptr
-    pub fn row_cache(self, val: Option<Cache>) -> Self {
+    pub fn row_cache(self, val: Option<&Cache>) -> Self {
         unsafe {
             if let Some(cache) = val {
                 ll::rocks_dboptions_set_row_cache(self.raw, cache.raw());
diff --git a/src/table.rs b/src/table.rs
index 0a273f4..709c035 100644
--- a/src/table.rs
+++ b/src/table.rs
@@ -166,7 +166,7 @@ impl BlockBasedTableOptions {
     /// If non-NULL use the specified cache for blocks.
     ///
     /// If NULL, rocksdb will automatically create and use an 8MB internal cache.
-    pub fn block_cache(self, val: Option<Cache>) -> Self {
+    pub fn block_cache(self, val: Option<&Cache>) -> Self {
         unsafe {
             let ptr = val.map(|c| c.raw()).unwrap_or_else(ptr::null_mut);
             ll::rocks_block_based_table_options_set_block_cache(self.raw, ptr);
@@ -189,7 +189,7 @@ impl BlockBasedTableOptions {
     /// If non-NULL use the specified cache for compressed blocks.
     ///
     /// If NULL, rocksdb will not use a compressed block cache.
-    pub fn block_cache_compressed(self, val: Option<Cache>) -> Self {
+    pub fn block_cache_compressed(self, val: Option<&Cache>) -> Self {
         unsafe {
             let ptr = val.map(|c| c.raw()).unwrap_or_else(ptr::null_mut);
             ll::rocks_block_based_table_options_set_block_cache_compressed(self.raw, ptr);