diff --git a/server/XfrmController.cpp b/server/XfrmController.cpp
index 34df936..7c0c59d 100644
--- a/server/XfrmController.cpp
+++ b/server/XfrmController.cpp
@@ -58,13 +58,15 @@
 namespace android {
 namespace net {
 
-namespace {
-
+// Exposed for testing
 constexpr uint32_t ALGO_MASK_AUTH_ALL = ~0;
+// Exposed for testing
 constexpr uint32_t ALGO_MASK_CRYPT_ALL = ~0;
-
+// Exposed for testing
 constexpr uint8_t REPLAY_WINDOW_SIZE = 4;
 
+namespace {
+
 constexpr uint32_t RAND_SPI_MIN = 1;
 constexpr uint32_t RAND_SPI_MAX = 0xFFFFFFFE;