diff --git a/src/statement.rs b/src/statement.rs
index 182f587..14d6a39 100755
--- a/src/statement.rs
+++ b/src/statement.rs
@@ -120,14 +120,18 @@ impl<'conn> Statement<'conn> {
     /// parameters, however this is not yet available through this crate.
     ///
     pub fn bind(&mut self, params: &[&ToSqlValue]) -> Result<(), OciError> {
+        // clear out previous bind parameters 
         self.values.clear();
+        
+        // ensure that the vec is large enough to hold all the parameters
+        // otherwise the vec will re-size, re-allocated and the addresses will change
+        self.values.reserve(params.len());
 
         for (index, param) in params.iter().enumerate() {
             let sql_value = param.to_sql_value();
             self.values.push(sql_value);
             let binding: *mut OCIBind = ptr::null_mut();
             self.bindings.push(binding);
-
             let position = (index + 1) as c_uint;
             let null_mut_ptr = ptr::null_mut();
             let indp = null_mut_ptr;
diff --git a/src/types.rs b/src/types.rs
index f90c289..87e4983 100755
--- a/src/types.rs
+++ b/src/types.rs
@@ -6,7 +6,7 @@ use oci_error::OciError;
 
 /// The types that support conversion from OCI to Rust types.
 ///
-#[derive(Debug, PartialEq)]
+#[derive(Debug, PartialEq, Clone)]
 pub enum SqlValue {
     /// Anything specified as `VARCHAR` or `VARCHAR2` will end up here.
     VarChar(String),