Index: gtk/OGApplication.m
==================================================================
--- gtk/OGApplication.m
+++ gtk/OGApplication.m
@@ -17,10 +17,12 @@
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
+
+#include <gtk/gtk.h>
 
 #import "OGApplication.h"
 
 OF_APPLICATION_DELEGATE(OGApplication)