diff --git a/event-config.h.cmake b/event-config.h.cmake
index f65461df..69eda9e3 100644
--- a/event-config.h.cmake
+++ b/event-config.h.cmake
@@ -268,6 +268,9 @@
 /* Define to 1 if you have the `sendfile' function. */
 #cmakedefine EVENT__HAVE_SENDFILE 1
 
+/* Define to 1 if you have the `pread' function. */
+#cmakedefine EVENT__HAVE_PREAD 1
+
 /* Define to 1 if you have the `sigaction' function. */
 #cmakedefine EVENT__HAVE_SIGACTION 1