diff --git a/plugins/certifier/CMakeLists.txt b/plugins/certifier/CMakeLists.txt
index 6495cfeb9e1..78117acb29e 100644
--- a/plugins/certifier/CMakeLists.txt
+++ b/plugins/certifier/CMakeLists.txt
@@ -15,4 +15,5 @@
 #
 #######################
 
+add_definitions(-DOPENSSL_API_COMPAT=10002)
 add_atsplugin(certifier certifier.cc)