diff --git a/src/config.h.in b/src/config.h.in
index 01d541a2..ceb7e5a2 100644
--- a/src/config.h.in
+++ b/src/config.h.in
@@ -37,6 +37,8 @@
 
 // Define this to 1 if building GLFW for X11/GLX
 #cmakedefine _GLFW_X11_GLX
+// Define this to 1 if building GLFW for X11/EGL
+#cmakedefine _GLFW_X11_EGL
 // Define this to 1 if building GLFW for Win32/WGL
 #cmakedefine _GLFW_WIN32_WGL
 // Define this to 1 if building GLFW for Cocoa/NSOpenGL
@@ -63,6 +65,9 @@
 // Define this to 1 if glXGetProcAddressEXT is available
 #cmakedefine _GLFW_HAS_GLXGETPROCADDRESSEXT
 
+// Define this to 1 if eglGetProcAddress is available
+#cmakedefine _GLFW_HAS_EGLGETPROCADDRESS 1
+
 // Define this to 1 if the Linux joystick API is available
 #cmakedefine _GLFW_USE_LINUX_JOYSTICKS