diff --git a/src/main.c b/src/main.c
index 4cbcc8cf..31b377d3 100644
--- a/src/main.c
+++ b/src/main.c
@@ -667,6 +667,7 @@ done:
 }
 #endif
 
+#if TARGET_OS_IPHONE
 void tf_run_thread_start(const char* zip_path)
 {
 	_startup(0, NULL);
@@ -698,3 +699,4 @@ void tf_run_thread_start(const char* zip_path)
 	tf_free(threads);
 #endif
 }
+#endif