diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3421ca608a..100d770357 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -818,6 +818,7 @@ set(HDR_PRIVATE
     ratelim-internal.h
     strlcpy-internal.h
     util-internal.h
+    openssl-compat.h
     evconfig-private.h
     compat/sys/queue.h)