diff --git a/src/processor/map_serializers_unittest.cc b/src/processor/map_serializers_unittest.cc
index 95d03d01..0d872ec2 100644
--- a/src/processor/map_serializers_unittest.cc
+++ b/src/processor/map_serializers_unittest.cc
@@ -49,8 +49,6 @@
 typedef int32_t AddrType;
 typedef int32_t EntryType;
 
-const int kSizeOfInt = 4;
-
 class TestStdMapSerializer : public ::testing::Test {
  protected:
   void SetUp() {