diff --git a/src/modules/http_async_client/doc/http_async_client_admin.xml b/src/modules/http_async_client/doc/http_async_client_admin.xml
index 73fdf32841c..5a050bf424e 100644
--- a/src/modules/http_async_client/doc/http_async_client_admin.xml
+++ b/src/modules/http_async_client/doc/http_async_client_admin.xml
@@ -299,6 +299,11 @@ modparam("http_async_client", "tls_ca_path", "/etc/kamailio/ssl/ca/")
         <para>
 		    If defined to a non-zero value, TCP keepalive will be enabled on cURL connections.
 		</para>
+        <para>
+            <emphasis>
+            Requires libcurl >= 7.25.0
+            </emphasis>
+		</para>
 		<para>
 		<emphasis>
 			Default value is 0 (disabled).
diff --git a/src/modules/http_async_client/http_multi.c b/src/modules/http_async_client/http_multi.c
index 43936a78de8..948171b5194 100644
--- a/src/modules/http_async_client/http_multi.c
+++ b/src/modules/http_async_client/http_multi.c
@@ -529,6 +529,7 @@ int new_request(str *query, http_m_params_t *query_params, http_multi_cbe_t cb,
     
     /* enable tcp keepalives for the handler */
 	if (cell->params.tcp_keepalive) {
+#ifdef CURLOPT_TCP_KEEPALIVE
 		LM_DBG("Enabling TCP keepalives\n");
 		curl_easy_setopt(cell->easy, CURLOPT_TCP_KEEPALIVE, 1L);
 		
@@ -541,6 +542,9 @@ int new_request(str *query, http_m_params_t *query_params, http_multi_cbe_t cb,
 			curl_easy_setopt(cell->easy, CURLOPT_TCP_KEEPINTVL, cell->params.tcp_ka_interval);
 			LM_DBG("CURLOPT_TCP_KEEPINTERVAL set to %d\n", cell->params.tcp_ka_interval);
 		}
+#else
+		LM_DBG("tcp_keepalive configured, but installed cURL version doesn't include CURLOPT_TCP_KEEPINTERVAL.\n");
+#endif
 	}
 	
     LM_DBG("Adding easy %p to multi %p (%.*s)\n", cell->easy, g->multi, query->len, query->s);