From 8037f51b1326523973158ca3d0d68533391134d2 Mon Sep 17 00:00:00 2001
From: Gerardo Rodriguez <g@rodrz.com>
Date: Fri, 11 Sep 2026 23:52:53 -0400
Subject: [PATCH] gcm: fix instance ID registration field

---
 gcm.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcm.go b/gcm.go
index 6d83a02..2e4eeb4 100644
--- a/gcm.go
+++ b/gcm.go
@@ -38,7 +38,7 @@ func RegisterGCM(ctx context.Context, authorizationEntity string, creds GCMCrede
 	}
 
 	if opts != nil && opts.InstanceID != "" {
-		values.Set("appId", opts.InstanceID)
+		values.Set("appid", opts.InstanceID)
 	}
 
 	if opts != nil && opts.Expiry != 0 {