diff --git a/bpf/go_grpc.h b/bpf/go_grpc.h
index 904af18cd..b1914815f 100644
--- a/bpf/go_grpc.h
+++ b/bpf/go_grpc.h
@@ -150,7 +150,7 @@ int uprobe_netFdReadGRPC(struct pt_regs *ctx) {
     bpf_dbg_printk("tr %llx", tr);
     if (tr) {
         go_addr_key_t tr_key = {};
-        go_addr_key_from_id(&tr_key, tr);
+        go_addr_key_from_id(&tr_key, (u64 *)tr);
         grpc_transports_t *t = bpf_map_lookup_elem(&ongoing_grpc_transports, &tr_key);
         bpf_dbg_printk("t %llx", t);
         if (t) {