diff --git a/core/include/nova64_internal.h b/core/include/nova64_internal.h
index a4fdec3..3a86202 100644
--- a/core/include/nova64_internal.h
+++ b/core/include/nova64_internal.h
@@ -16,7 +16,9 @@ void nova64_log_scheduler_state(void);
 #include <unistd.h>
 #define nova64_host_sleep_ms(ms) usleep((ms) * 1000)
 #else
-#define nova64_host_sleep_ms(ms) ((void)0)
+#include "FreeRTOS.h"
+#include "task.h"
+#define nova64_host_sleep_ms(ms) vTaskDelay(pdMS_TO_TICKS(ms))
 #endif
 
 #endif // NOVA64_INTERNAL_H
\ No newline at end of file
diff --git a/core/src/nova64_core.c b/core/src/nova64_core.c
index 9cfc4c4..78c4afd 100644
--- a/core/src/nova64_core.c
+++ b/core/src/nova64_core.c
@@ -6,7 +6,6 @@
 #include "wasm_runner.h"
 #include <stdarg.h>
 #include <stdio.h>
-#include <stdlib.h>
 
 #if defined(ESP_PLATFORM)
 #include "esp_pm.h"