diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c
index 731cb43b570e..54f434733b56 100644
--- a/drivers/cxl/core/mbox.c
+++ b/drivers/cxl/core/mbox.c
@@ -243,7 +243,7 @@ static bool cxl_payload_from_user_allowed(u16 opcode, void *payload_in)
 	case CXL_MBOX_OP_SET_PARTITION_INFO: {
 		struct cxl_mbox_set_partition_info *pi = payload_in;
 
-		if (pi->flags && CXL_SET_PARTITION_IMMEDIATE_FLAG)
+		if (pi->flags & CXL_SET_PARTITION_IMMEDIATE_FLAG)
 			return false;
 		break;
 	}