diff --git a/Cargo.lock b/Cargo.lock
index dc92852..d200fa2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -9,6 +9,7 @@ dependencies = [
  "glib 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "glib-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "gtk 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gtk-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "neovim-lib 0.2.0 (git+https://github.com/daa84/neovim-lib)",
  "pango 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "pangocairo 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/Cargo.toml b/Cargo.toml
index b35d32b..f81a778 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,3 +26,7 @@ phf_codegen = "0.7"
 version = "0.1"
 features = ["v3_10"]
 
+[dependencies.gtk-sys]
+version = "0.3"
+features = ["v3_10"]
+
diff --git a/src/main.rs b/src/main.rs
index 2eca285..c9903fa 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,5 @@
 extern crate gtk;
+extern crate gtk_sys;
 extern crate gio;
 extern crate gdk;
 extern crate gdk_sys;
diff --git a/src/ui.rs b/src/ui.rs
index 8e3575e..d6b3eaf 100644
--- a/src/ui.rs
+++ b/src/ui.rs
@@ -10,6 +10,7 @@ use pango::FontDescription;
 use gtk;
 use gtk::prelude::*;
 use gtk::{ApplicationWindow, HeaderBar, DrawingArea, ToolButton, Image};
+use gtk_sys;
 use gdk::{ModifierType, Event, EventKey, EventConfigure, EventButton, EventMotion, EventType};
 use gdk_sys;
 use glib;
@@ -95,12 +96,12 @@ impl Ui {
     pub fn init(&mut self, app: &gtk::Application) {
         self.header_bar.set_show_close_button(true);
 
-        let save_image = Image::new_from_icon_name("document-save", 50);
+        let save_image = Image::new_from_icon_name("document-save", gtk_sys::GTK_ICON_SIZE_SMALL_TOOLBAR as i32);
         let save_btn = ToolButton::new(Some(&save_image), None);
         save_btn.connect_clicked(|_| edit_save_all());
         self.header_bar.pack_start(&save_btn);
 
-        let paste_image = Image::new_from_icon_name("edit-paste", 50);
+        let paste_image = Image::new_from_icon_name("edit-paste", gtk_sys::GTK_ICON_SIZE_SMALL_TOOLBAR as i32);
         let paste_btn = ToolButton::new(Some(&paste_image), None);
         paste_btn.connect_clicked(|_| edit_paste());
         self.header_bar.pack_start(&paste_btn);