diff --git a/alpm/src/remove.rs b/alpm/src/remove.rs
index 801edca..7246265 100644
--- a/alpm/src/remove.rs
+++ b/alpm/src/remove.rs
@@ -3,7 +3,7 @@ use crate::{Alpm, Package, Result};
 use alpm_sys::*;
 
 impl Alpm {
-    pub fn trans_remove_pkg(&self, pkg: Package) -> Result<()> {
+    pub fn trans_remove_pkg(&self, pkg: &Package) -> Result<()> {
         let ret = unsafe { alpm_remove_pkg(self.as_ptr(), pkg.as_ptr()) };
         self.check_ret(ret)
     }
diff --git a/alpm/src/trans.rs b/alpm/src/trans.rs
index ea46eff..1eab7d4 100644
--- a/alpm/src/trans.rs
+++ b/alpm/src/trans.rs
@@ -12,7 +12,7 @@ use std::ptr;
 use bitflags::bitflags;
 
 bitflags! {
-    #[derive(Debug, PartialEq, Eq)]
+    #[derive(Debug, PartialEq, Eq, Copy, Clone)]
     pub struct TransFlag: u32 {
         const NONE = 0;
         const NO_DEPS = ALPM_TRANS_FLAG_NODEPS;
diff --git a/alpm/src/types.rs b/alpm/src/types.rs
index 96cd0c5..06f1ae8 100644
--- a/alpm/src/types.rs
+++ b/alpm/src/types.rs
@@ -35,7 +35,7 @@ pub enum FetchResult {
 }
 
 bitflags! {
-    #[derive(Debug, PartialEq, Eq)]
+    #[derive(Debug, PartialEq, Eq, Clone, Copy)]
     pub struct SigLevel: u32 {
         const NONE = 0;
         const PACKAGE = ALPM_SIG_PACKAGE;
@@ -51,7 +51,7 @@ bitflags! {
 }
 
 bitflags! {
-    #[derive(Debug, PartialEq, Eq)]
+    #[derive(Debug, PartialEq, Eq, Clone, Copy)]
     pub struct Usage: u32 {
         const NONE = 0;
         const SYNC = ALPM_DB_USAGE_SYNC;
@@ -63,7 +63,7 @@ bitflags! {
 }
 
 bitflags! {
-    #[derive(Debug, PartialEq, Eq)]
+    #[derive(Debug, PartialEq, Eq, Clone, Copy)]
     pub struct LogLevel: u32 {
         const NONE = 0;
         const ERROR = ALPM_LOG_ERROR;
@@ -104,7 +104,7 @@ pub enum PackageReason {
 }
 
 bitflags! {
-    #[derive(Debug, PartialEq, Eq)]
+    #[derive(Debug, PartialEq, Eq, Clone, Copy)]
     pub struct PackageValidation: u32 {
         const UNKNOWN = ALPM_PKG_VALIDATION_UNKNOWN;
         const NONE = ALPM_PKG_VALIDATION_NONE;