diff --git a/clients/c/cosmopolite.c b/clients/c/cosmopolite.c
index 6fefd6e..7b80853 100644
--- a/clients/c/cosmopolite.c
+++ b/clients/c/cosmopolite.c
@@ -196,7 +196,7 @@ static json_t *cosmo_command(const char *name, const json_t *arguments) {
 // Takes ownership of commands.
 static json_t *cosmo_send_rpc(cosmo *instance, json_t *commands) {
   // Always poll.
-  json_array_append(commands, cosmo_command("poll", json_array()));
+  json_array_append_new(commands, cosmo_command("poll", json_array()));
 
   char *request = cosmo_build_rpc(instance, commands);
 
diff --git a/clients/c/suppressions b/clients/c/suppressions
index 0f696ac..0c9dfd4 100644
--- a/clients/c/suppressions
+++ b/clients/c/suppressions
@@ -9,41 +9,14 @@
 }
 
 {
-   curl_easy_perform_1
+   curl_easy_perform
    Memcheck:Leak
    fun:malloc
    fun:CRYPTO_malloc
+   ...
    fun:ERR_get_state
    fun:ERR_clear_error
-   obj:/usr/lib/x86_64-linux-gnu/libcurl.so.4.2.0
-   obj:/usr/lib/x86_64-linux-gnu/libcurl.so.4.2.0
-   obj:/usr/lib/x86_64-linux-gnu/libcurl.so.4.2.0
-   obj:/usr/lib/x86_64-linux-gnu/libcurl.so.4.2.0
-   obj:/usr/lib/x86_64-linux-gnu/libcurl.so.4.2.0
-   obj:/usr/lib/x86_64-linux-gnu/libcurl.so.4.2.0
-   obj:/usr/lib/x86_64-linux-gnu/libcurl.so.4.2.0
-   obj:/usr/lib/x86_64-linux-gnu/libcurl.so.4.2.0
-   fun:cosmo_thread_main
-   fun:start_thread
-   fun:clone
-}
-{
-   curl_easy_perform_2
-   Memcheck:Leak
-   fun:malloc
-   fun:CRYPTO_malloc
-   fun:lh_insert
-   obj:/usr/lib/x86_64-linux-gnu/libcrypto.so.1.0.0
-   fun:ERR_get_state
-   fun:ERR_clear_error
-   obj:/usr/lib/x86_64-linux-gnu/libcurl.so.4.2.0
-   obj:/usr/lib/x86_64-linux-gnu/libcurl.so.4.2.0
-   obj:/usr/lib/x86_64-linux-gnu/libcurl.so.4.2.0
-   obj:/usr/lib/x86_64-linux-gnu/libcurl.so.4.2.0
-   obj:/usr/lib/x86_64-linux-gnu/libcurl.so.4.2.0
-   obj:/usr/lib/x86_64-linux-gnu/libcurl.so.4.2.0
-   obj:/usr/lib/x86_64-linux-gnu/libcurl.so.4.2.0
-   obj:/usr/lib/x86_64-linux-gnu/libcurl.so.4.2.0
+   ...
    fun:cosmo_thread_main
    fun:start_thread
    fun:clone