diff --git a/src/testcurl/https/test_https_session_info.c b/src/testcurl/https/test_https_session_info.c
index e300c910..1aa50955 100644
--- a/src/testcurl/https/test_https_session_info.c
+++ b/src/testcurl/https/test_https_session_info.c
@@ -54,7 +54,7 @@ query_session_ahc (void *cls, struct MHD_Connection *connection,
 
   if (NULL == *ptr)
     {
-      *ptr = &query_session_ahc;
+      *ptr = (void*)&query_session_ahc;
       return MHD_YES;
     }