diff --git a/pw_ring_buffer/prefixed_entry_ring_buffer_test.cc b/pw_ring_buffer/prefixed_entry_ring_buffer_test.cc
index 88ed331d60..f9325551e2 100644
--- a/pw_ring_buffer/prefixed_entry_ring_buffer_test.cc
+++ b/pw_ring_buffer/prefixed_entry_ring_buffer_test.cc
@@ -16,6 +16,7 @@
 
 #include <cstddef>
 #include <cstdint>
+#include <cstring>
 
 #include "gtest/gtest.h"
 #include "pw_assert/check.h"