diff --git a/examples/protocols/smtp_client/main/smtp_client_example_main.c b/examples/protocols/smtp_client/main/smtp_client_example_main.c
index 36b19b6ee4..c07d39fefb 100644
--- a/examples/protocols/smtp_client/main/smtp_client_example_main.c
+++ b/examples/protocols/smtp_client/main/smtp_client_example_main.c
@@ -497,7 +497,7 @@ exit:
     vTaskDelete(NULL);
 }
 
-void app_main()
+void app_main(void)
 {
     ESP_ERROR_CHECK(nvs_flash_init());
     ESP_ERROR_CHECK(esp_netif_init());
diff --git a/tools/ci/build_examples_cmake.sh b/tools/ci/build_examples_cmake.sh
index b1eecf287b..fc8089b65e 100755
--- a/tools/ci/build_examples_cmake.sh
+++ b/tools/ci/build_examples_cmake.sh
@@ -44,6 +44,9 @@ if [ -z ${CI_NODE_INDEX} ]; then
 fi
 
 
+export EXTRA_CFLAGS="${PEDANTIC_CFLAGS:-}"
+export EXTRA_CXXFLAGS="${PEDANTIC_CXXFLAGS:-}"
+
 set -o nounset # Exit if variable not set.
 
 export REALPATH=realpath