diff --git a/extent_ranges_unittest.cc b/extent_ranges_unittest.cc
index 1b767f1..ba00d0d 100644
--- a/extent_ranges_unittest.cc
+++ b/extent_ranges_unittest.cc
@@ -7,6 +7,7 @@
 #include <gtest/gtest.h>
 
 #include "update_engine/extent_ranges.h"
+#include "update_engine/payload_constants.h"
 #include "update_engine/test_utils.h"
 
 using std::vector;