diff --git a/configure.ac b/configure.ac
index 38d9222068..1d8cfa78f0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -454,7 +454,7 @@ AC_CHECK_MEMBERS([struct event.min_heap_idx], , ,
 [#include <event.h>
 ])
 
-AC_CHECK_HEADERS(event2/event.h event2/dns.h)
+AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
 
 LIBS="$save_LIBS"
 LDFLAGS="$save_LDFLAGS"