diff --git a/Cargo.toml b/Cargo.toml
index 8d631a7..7e8da0f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -43,8 +43,6 @@ collation = []
 functions = []
 # sqlite3_log: 3.6.23 (2010-03-09)
 trace = []
-# sqlite3_db_release_memory: 3.7.10 (2012-01-16)
-release_memory = []
 bundled = ["libsqlite3-sys/bundled", "modern_sqlite"]
 bundled-sqlcipher = ["libsqlite3-sys/bundled-sqlcipher", "bundled"]
 bundled-sqlcipher-vendored-openssl = [
diff --git a/src/inner_connection.rs b/src/inner_connection.rs
index f1269c6..edfaade 100644
--- a/src/inner_connection.rs
+++ b/src/inner_connection.rs
@@ -382,7 +382,6 @@ impl InnerConnection {
     }
 
     #[inline]
-    #[cfg(feature = "release_memory")]
     pub fn release_memory(&self) -> Result<()> {
         self.decode_result(unsafe { ffi::sqlite3_db_release_memory(self.db) })
     }
diff --git a/src/lib.rs b/src/lib.rs
index e80da3a..aaf422f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -652,7 +652,6 @@ impl Connection {
     ///
     /// This calls [`sqlite3_db_release_memory`](https://www.sqlite.org/c3ref/db_release_memory.html).
     #[inline]
-    #[cfg(feature = "release_memory")]
     pub fn release_memory(&self) -> Result<()> {
         self.db.borrow_mut().release_memory()
     }