diff --git a/tests/component/imgdiff_test.cpp b/tests/component/imgdiff_test.cpp
index 161d58d..bf591da 100644
--- a/tests/component/imgdiff_test.cpp
+++ b/tests/component/imgdiff_test.cpp
@@ -24,6 +24,7 @@
 #include <android-base/file.h>
 #include <android-base/memory.h>
 #include <android-base/stringprintf.h>
+#include <android-base/strings.h>
 #include <android-base/test_utils.h>
 #include <applypatch/imgdiff.h>
 #include <applypatch/imgdiff_image.h>