diff --git a/src/cocoa_window.m b/src/cocoa_window.m
index d2aab85f9..e606bcb2d 100644
--- a/src/cocoa_window.m
+++ b/src/cocoa_window.m
@@ -1288,6 +1288,10 @@ void _glfwPlatformFocusWindow(_GLFWwindow* window)
     [window->ns.object makeKeyAndOrderFront:nil];
 }
 
+void _glfwPlatformDragWindow(_GLFWwindow* window)
+{
+}
+
 void _glfwPlatformSetWindowMonitor(_GLFWwindow* window,
                                    _GLFWmonitor* monitor,
                                    int xpos, int ypos,
diff --git a/src/mir_window.c b/src/mir_window.c
index e380f4070..484690be6 100644
--- a/src/mir_window.c
+++ b/src/mir_window.c
@@ -576,6 +576,10 @@ void _glfwPlatformFocusWindow(_GLFWwindow* window)
                     "Mir: Unsupported function %s", __PRETTY_FUNCTION__);
 }
 
+void _glfwPlatformDragWindow(_GLFWwindow* window)
+{
+}
+
 void _glfwPlatformSetWindowMonitor(_GLFWwindow* window,
                                    _GLFWmonitor* monitor,
                                    int xpos, int ypos,