diff --git a/internal/glfw/window_unix.c b/internal/glfw/window_unix.c
index 514bd2c01..494b557f1 100644
--- a/internal/glfw/window_unix.c
+++ b/internal/glfw/window_unix.c
@@ -209,7 +209,7 @@ void glfwDefaultWindowHints(void)
 
     // The default is OpenGL with minimum version 1.0
     memset(&_glfw.hints.context, 0, sizeof(_glfw.hints.context));
-    _glfw.hints.context.client = GLFW_OPENGL_API;
+    _glfw.hints.context.client = GLFW_NO_API;  // This is different from the original GLFW, which uses GLFW_OPENGL_API by default.
     _glfw.hints.context.source = GLFW_NATIVE_CONTEXT_API;
     _glfw.hints.context.major  = 1;
     _glfw.hints.context.minor  = 0;
diff --git a/internal/glfw/window_windows.go b/internal/glfw/window_windows.go
index 4ddfdde16..9ac995c9d 100644
--- a/internal/glfw/window_windows.go
+++ b/internal/glfw/window_windows.go
@@ -160,7 +160,7 @@ func defaultWindowHints() error {
 
 	// The default is OpenGL with minimum version 1.0
 	_glfw.hints.context = ctxconfig{
-		client: OpenGLAPI,
+		client: NoAPI, // This is different from the original GLFW, which uses OpenGLAPI by default.
 		source: NativeContextAPI,
 		major:  1,
 		minor:  0,
diff --git a/internal/ui/ui_glfw.go b/internal/ui/ui_glfw.go
index e26354986..7f4fc09e4 100644
--- a/internal/ui/ui_glfw.go
+++ b/internal/ui/ui_glfw.go
@@ -1106,11 +1106,8 @@ func (u *UserInterface) initOnMainThread(options *RunOptions) error {
 	u.setGraphicsLibrary(lib)
 	u.graphicsDriver.SetTransparent(options.ScreenTransparent)
 
-	if u.GraphicsLibrary() != GraphicsLibraryOpenGL {
-		if err := glfw.WindowHint(glfw.ClientAPI, glfw.NoAPI); err != nil {
-			return err
-		}
-	}
+	// internal/glfw is customized and the default client API is NoAPI, not OpenGLAPI.
+	// Then, glfw.WindowHint(glfw.ClientAPI, glfw.NoAPI) doesn't have to be called.
 
 	// Before creating a window, set it unresizable no matter what u.isInitWindowResizable() is (#1987).
 	// Making the window resizable here doesn't work correctly when switching to enable resizing.