diff --git a/hepa-uv/simulator/gpio.cpp b/hepa-uv/simulator/gpio.cpp
index a1806439a..cb0338f85 100644
--- a/hepa-uv/simulator/gpio.cpp
+++ b/hepa-uv/simulator/gpio.cpp
@@ -1,4 +1,3 @@
-#pragma once
 #include <cstdint>
 
 namespace gpio {