diff --git a/src/test/fuzz/http_request.cpp b/src/test/fuzz/http_request.cpp
--- a/src/test/fuzz/http_request.cpp
+++ b/src/test/fuzz/http_request.cpp
@@ -10,6 +10,7 @@
 #include <test/fuzz/util.h>
 
 #include <event2/buffer.h>
+#include <event2/event.h>
 #include <event2/http.h>
 #include <event2/http_struct.h>
 
@@ -18,10 +19,26 @@
 #include <string>
 #include <vector>
 
+// workaround for libevent versions before 2.1.1,
+// when internal functions didn't have underscores at the end
+#if LIBEVENT_VERSION_NUMBER < 0x02010100
+extern "C" int evhttp_parse_firstline(struct evhttp_request *,
+                                      struct evbuffer *);
+extern "C" int evhttp_parse_headers(struct evhttp_request *, struct evbuffer *);
+inline int evhttp_parse_firstline_(struct evhttp_request *r,
+                                   struct evbuffer *b) {
+    return evhttp_parse_firstline(r, b);
+}
+inline int evhttp_parse_headers_(struct evhttp_request *r, struct evbuffer *b) {
+    return evhttp_parse_headers(r, b);
+}
+#else
 extern "C" int evhttp_parse_firstline_(struct evhttp_request *,
                                        struct evbuffer *);
 extern "C" int evhttp_parse_headers_(struct evhttp_request *,
                                      struct evbuffer *);
+#endif
+
 std::string RequestMethodString(HTTPRequest::RequestMethod m);
 
 void test_one_input(const std::vector<uint8_t> &buffer) {