diff --git a/clients/nested.c b/clients/nested.c
index 173076a68cb7dddd7ea013656e0eee8c12574bfc..e9070e9bbccb6f8f954589db47d01b584ae5d067 100644
--- a/clients/nested.c
+++ b/clients/nested.c
@@ -748,7 +748,7 @@ nested_init_compositor(struct nested *nested)
 
 	nested->egl_display = display_get_egl_display(nested->display);
 	extensions = eglQueryString(nested->egl_display, EGL_EXTENSIONS);
-	if (weston_check_egl_extension(extensions, "EGL_WL_bind_wayland_display") == NULL) {
+	if (!weston_check_egl_extension(extensions, "EGL_WL_bind_wayland_display")) {
 		fprintf(stderr, "no EGL_WL_bind_wayland_display extension\n");
 		return -1;
 	}