diff --git a/src/x11_window.c b/src/x11_window.c
index 164f1070..53960481 100644
--- a/src/x11_window.c
+++ b/src/x11_window.c
@@ -205,13 +205,13 @@ static GLboolean createWindow(_GLFWwindow* window,
 
         // The WM_DELETE_WINDOW ICCCM protocol
         // Basic window close notification protocol
-        if (_glfw.x11.WM_DELETE_WINDOW != None)
+        if (_glfw.x11.WM_DELETE_WINDOW)
             protocols[count++] = _glfw.x11.WM_DELETE_WINDOW;
 
         // The _NET_WM_PING EWMH protocol
         // Tells the WM to ping the GLFW window and flag the application as
         // unresponsive if the WM doesn't get a reply within a few seconds
-        if (_glfw.x11.NET_WM_PING != None)
+        if (_glfw.x11.NET_WM_PING)
             protocols[count++] = _glfw.x11.NET_WM_PING;
 
         if (count > 0)
@@ -221,7 +221,7 @@ static GLboolean createWindow(_GLFWwindow* window,
         }
     }
 
-    if (_glfw.x11.NET_WM_PID != None)
+    if (_glfw.x11.NET_WM_PID)
     {
         const pid_t pid = getpid();
 
@@ -399,7 +399,7 @@ static void enterFullscreenMode(_GLFWwindow* window)
 
     _glfwSetVideoMode(window->monitor, &window->videoMode);
 
-    if (_glfw.x11.NET_WM_BYPASS_COMPOSITOR != None)
+    if (_glfw.x11.NET_WM_BYPASS_COMPOSITOR)
     {
         const unsigned long value = 1;
 
@@ -408,15 +408,13 @@ static void enterFullscreenMode(_GLFWwindow* window)
                         PropModeReplace, (unsigned char*) &value, 1);
     }
 
-    if (_glfw.x11.hasEWMH &&
-        _glfw.x11.NET_WM_STATE != None &&
-        _glfw.x11.NET_WM_STATE_FULLSCREEN != None)
+    if (_glfw.x11.NET_WM_STATE && _glfw.x11.NET_WM_STATE_FULLSCREEN)
     {
         int x, y;
         _glfwPlatformGetMonitorPos(window->monitor, &x, &y);
         _glfwPlatformSetWindowPos(window, x, y);
 
-        if (_glfw.x11.NET_ACTIVE_WINDOW != None)
+        if (_glfw.x11.NET_ACTIVE_WINDOW)
         {
             // Ask the window manager to raise and focus the GLFW window
             // Only focused windows with the _NET_WM_STATE_FULLSCREEN state end
@@ -496,7 +494,7 @@ static void leaveFullscreenMode(_GLFWwindow* window)
                         _glfw.x11.saver.exposure);
     }
 
-    if (_glfw.x11.NET_WM_BYPASS_COMPOSITOR != None)
+    if (_glfw.x11.NET_WM_BYPASS_COMPOSITOR)
     {
         const unsigned long value = 0;
 
@@ -505,9 +503,7 @@ static void leaveFullscreenMode(_GLFWwindow* window)
                         PropModeReplace, (unsigned char*) &value, 1);
     }
 
-    if (_glfw.x11.hasEWMH &&
-        _glfw.x11.NET_WM_STATE != None &&
-        _glfw.x11.NET_WM_STATE_FULLSCREEN != None)
+    if (_glfw.x11.NET_WM_STATE && _glfw.x11.NET_WM_STATE_FULLSCREEN)
     {
         // Ask the window manager to make the GLFW window a normal window
         // Normal windows usually have frames and other decorations
@@ -735,7 +731,7 @@ static void processEvent(XEvent *event)
 
                 _glfwInputWindowCloseRequest(window);
             }
-            else if (_glfw.x11.NET_WM_PING != None &&
+            else if (_glfw.x11.NET_WM_PING &&
                      (Atom) event->xclient.data.l[0] == _glfw.x11.NET_WM_PING)
             {
                 // The window manager is pinging the application to ensure it's
@@ -1017,7 +1013,7 @@ void _glfwPlatformSetWindowTitle(_GLFWwindow* window, const char* title)
                        NULL, NULL, NULL);
 #endif
 
-    if (_glfw.x11.NET_WM_NAME != None)
+    if (_glfw.x11.NET_WM_NAME)
     {
         XChangeProperty(_glfw.x11.display,  window->x11.handle,
                         _glfw.x11.NET_WM_NAME, _glfw.x11.UTF8_STRING, 8,
@@ -1025,7 +1021,7 @@ void _glfwPlatformSetWindowTitle(_GLFWwindow* window, const char* title)
                         (unsigned char*) title, strlen(title));
     }
 
-    if (_glfw.x11.NET_WM_ICON_NAME != None)
+    if (_glfw.x11.NET_WM_ICON_NAME)
     {
         XChangeProperty(_glfw.x11.display,  window->x11.handle,
                         _glfw.x11.NET_WM_ICON_NAME, _glfw.x11.UTF8_STRING, 8,
@@ -1042,7 +1038,7 @@ void _glfwPlatformGetWindowPos(_GLFWwindow* window, int* xpos, int* ypos)
     XTranslateCoordinates(_glfw.x11.display, window->x11.handle, _glfw.x11.root,
                           0, 0, &x, &y, &child);
 
-    if (child != None)
+    if (child)
     {
         int left, top;