diff --git a/include/icsneo/icsneo.h b/include/icsneo/icsneo.h
index fb9dee5..7222e74 100644
--- a/include/icsneo/icsneo.h
+++ b/include/icsneo/icsneo.h
@@ -1,3 +1,5 @@
+#pragma once
+
 #include <stdint.h>
 
 #ifdef __cplusplus