diff --git a/brave/net/http/partitioned_host_state_map.h b/brave/net/http/partitioned_host_state_map.h
index 891b141dd9..0a39f5f042 100644
--- a/brave/net/http/partitioned_host_state_map.h
+++ b/brave/net/http/partitioned_host_state_map.h
@@ -8,6 +8,7 @@
 
 #include <array>
 #include <string>
+#include <cstring>
 
 #include "base/auto_reset.h"
 #include "base/containers/span.h"