diff --git a/src/factory/KafkaTaskImpl.cc b/src/factory/KafkaTaskImpl.cc
index 8140cd19..0156d3d7 100644
--- a/src/factory/KafkaTaskImpl.cc
+++ b/src/factory/KafkaTaskImpl.cc
@@ -21,6 +21,7 @@
 #include <stdio.h>
 #include <string>
 #include <set>
+#include <openssl/ssl.h>
 #include <openssl/sha.h>
 #include <openssl/evp.h>
 #include "StringUtil.h"