diff --git a/cbindgen.toml b/cbindgen.toml
index 226d713..f3d2293 100644
--- a/cbindgen.toml
+++ b/cbindgen.toml
@@ -13,7 +13,7 @@ language = "C++"
 # header = "/* Text to put at the beginning of the generated file. Probably a license. */"
 # trailer = "/* Text to put at the end of the generated file */"
 # include_guard = "my_bindings_h"
-# pragma_once = true
+pragma_once = true
 # autogen_warning = "/* Warning, this file is autogenerated by cbindgen. Don't modify this manually. */"
 include_version = false
 namespace = "dcont"