diff --git a/cmake/modules/FindLibevent2.cmake b/cmake/modules/FindLibevent2.cmake
index 829a3d19..7e363de2 100644
--- a/cmake/modules/FindLibevent2.cmake
+++ b/cmake/modules/FindLibevent2.cmake
@@ -52,7 +52,7 @@ if (LIBEVENT2_INCLUDE_DIR AND LIBEVENT2_LIBRARY)
       )
   endif ()
 
-  if (NOT LIBEVENT2_VERSION AND LIBEVENT2_INCLUDE_DIR AND EXISTS "${LIBEVENT2_INCLUDE_DIR}/unbound.h")
+  if (NOT LIBEVENT2_VERSION AND LIBEVENT2_INCLUDE_DIR AND EXISTS "${LIBEVENT2_INCLUDE_DIR}/event2/event.h")
     file(STRINGS "${LIBEVENT2_INCLUDE_DIR}/event2/event-config.h" LIBEVENT2_H REGEX "^#define _?EVENT_+VERSION ")
     string(REGEX REPLACE "^.*EVENT_+VERSION \"([^\"]+)\".*$" "\\1" LIBEVENT2_VERSION "${LIBEVENT2_H}")
   endif ()