diff --git a/fuzzer/libldac_encode_fuzzer.cc b/fuzzer/libldac_encode_fuzzer.cc
index 501d177..712f8e4 100644
--- a/fuzzer/libldac_encode_fuzzer.cc
+++ b/fuzzer/libldac_encode_fuzzer.cc
@@ -6,6 +6,7 @@
 #include <stddef.h>
 #include "ldacBT.h"
 
+#include <functional>
 #include <fuzzer/FuzzedDataProvider.h>
 #include <vector>