diff --git a/external/unbound/config.h.cmake.in b/external/unbound/config.h.cmake.in
index d9bfebf3..377bcd97 100644
--- a/external/unbound/config.h.cmake.in
+++ b/external/unbound/config.h.cmake.in
@@ -575,7 +575,8 @@
 #cmakedefine USE_GOST
 
 /* Define if you want to use internal select based events */
-#cmakedefine USE_MINI_EVENT
+/* #cmakedefine USE_MINI_EVENT */
+#define USE_MINI_EVENT 1
 
 /* Define this to enable SHA256 and SHA512 support. */
 #cmakedefine USE_SHA2