diff --git a/server/red-replay-qxl.c b/server/red-replay-qxl.c
index 66acf1e3..7a146b6c 100644
--- a/server/red-replay-qxl.c
+++ b/server/red-replay-qxl.c
@@ -1156,7 +1156,7 @@ SPICE_GNUC_VISIBLE QXLCommandExt* spice_replay_next_cmd(SpiceReplay *replay,
     case QXL_CMD_UPDATE:
     case QXL_CMD_SURFACE:
         info = (QXLReleaseInfo *)cmd->cmd.data;
-        info->id = (uint64_t)cmd;
+        info->id = (uint64_t)(uintptr_t)cmd;
     }
 
     replay->counter++;