diff --git a/libcef/web_drag_source_gtk.cc b/libcef/web_drag_source_gtk.cc
index 67388c8d1..9dd4caabc 100644
--- a/libcef/web_drag_source_gtk.cc
+++ b/libcef/web_drag_source_gtk.cc
@@ -5,6 +5,7 @@
 
 #include "libcef/web_drag_source_gtk.h"
 
+#include <gdk/gdk.h>
 #include <string>
 
 #include "libcef/browser_impl.h"
diff --git a/libcef/web_drop_target_gtk.cc b/libcef/web_drop_target_gtk.cc
index e3c19b286..7a5ec1378 100644
--- a/libcef/web_drop_target_gtk.cc
+++ b/libcef/web_drop_target_gtk.cc
@@ -5,6 +5,7 @@
 
 #include "libcef/web_drop_target_gtk.h"
 
+#include <gdk/gdk.h>
 #include <string>
 
 #include "libcef/browser_impl.h"