diff --git a/src/test_lib_json/fuzz.h b/src/test_lib_json/fuzz.h
index 60897a4..d5bc08e 100644
--- a/src/test_lib_json/fuzz.h
+++ b/src/test_lib_json/fuzz.h
@@ -7,7 +7,7 @@
 #define FUZZ_H_INCLUDED
 
 #include <cstddef>
-#include <cstdint>
+#include <stdint.h>
 
 int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size);