diff --git a/build.rs b/build.rs
index 7764f23bb..17dde1894 100644
--- a/build.rs
+++ b/build.rs
@@ -4,6 +4,24 @@ use std::{borrow::Cow, collections::HashMap, io::BufWriter, path::Path};
 
 const GENERATION_PATH: &str = "include/zenoh-gen.h";
 const SPLITGUIDE_PATH: &str = "splitguide.yaml";
+const HEADER: &str = r"//
+// Copyright (c) 2022 ZettaScale Technology
+//
+// This program and the accompanying materials are made available under the
+// terms of the Eclipse Public License 2.0 which is available at
+// http://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
+// which is available at https://www.apache.org/licenses/LICENSE-2.0.
+//
+// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
+//
+// Contributors:
+//   ZettaScale Zenoh Team, <zenoh@zettascale.tech>
+//
+#ifdef DOCS
+#define ALIGN(n)
+#define ZENOHC_API
+#endif
+";
 
 fn main() {
     cbindgen::generate(std::env::var("CARGO_MANIFEST_DIR").unwrap())
@@ -100,6 +118,10 @@ fn split_bindings(split_guide: &SplitGuide) -> Result<(), String> {
             (name.as_str(), BufWriter::new(file))
         })
         .collect::<HashMap<_, _>>();
+    for file in files.values_mut() {
+        file.write_all(HEADER.as_bytes())
+            .map_err(|e| e.to_string())?;
+    }
     let mut records = group_tokens(Tokenizer {
         filename: GENERATION_PATH,
         inner: &bindings,
diff --git a/cbindgen.toml b/cbindgen.toml
index fd2ab44c9..49713759f 100644
--- a/cbindgen.toml
+++ b/cbindgen.toml
@@ -24,21 +24,7 @@ language = "C"
 
 ############## Options for Wrapping the Contents of the Header #################
 
-header = """
-//
-// Copyright (c) 2022 ZettaScale Technology
-//
-// This program and the accompanying materials are made available under the
-// terms of the Eclipse Public License 2.0 which is available at
-// http://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
-// which is available at https://www.apache.org/licenses/LICENSE-2.0.
-//
-// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
-//
-// Contributors:
-//   ZettaScale Zenoh Team, <zenoh@zettascale.tech>
-//
-"""
+# 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 = "ZENOH_FUNCTIONS"
 # pragma_once = true
diff --git a/docs/conf.py b/docs/conf.py
index 6da579f74..165c68f26 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -26,9 +26,10 @@
 extensions = ['sphinx_c_autodoc', 'sphinx_c_autodoc.napoleon']
 language = 'c'
 c_autodoc_roots = ['../include']
+c_autodoc_compilation_args = ["-DDOCS"]
 
 # -- Options for HTML output -------------------------------------------------
 html_theme = 'sphinx_rtd_theme'
 
 # ----------------------------------------------------------------------------
-Config.set_library_file('/usr/lib/llvm-6.0/lib/libclang.so.1')
+Config.set_library_file('/usr/lib/llvm-14/lib/libclang.so.1')
diff --git a/include/zenoh_commons.h b/include/zenoh_commons.h
index 15385a3d8..763c267aa 100644
--- a/include/zenoh_commons.h
+++ b/include/zenoh_commons.h
@@ -1,3 +1,20 @@
+//
+// Copyright (c) 2022 ZettaScale Technology
+//
+// This program and the accompanying materials are made available under the
+// terms of the Eclipse Public License 2.0 which is available at
+// http://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
+// which is available at https://www.apache.org/licenses/LICENSE-2.0.
+//
+// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
+//
+// Contributors:
+//   ZettaScale Zenoh Team, <zenoh@zettascale.tech>
+//
+#ifdef DOCS
+#define ALIGN(n)
+#define ZENOHC_API
+#endif
 /**
  * The kind of congestion control.
  *
diff --git a/include/zenoh_concrete.h b/include/zenoh_concrete.h
index 1110523db..000004c3e 100644
--- a/include/zenoh_concrete.h
+++ b/include/zenoh_concrete.h
@@ -11,6 +11,10 @@
 // Contributors:
 //   ZettaScale Zenoh Team, <zenoh@zettascale.tech>
 //
+#ifdef DOCS
+#define ALIGN(n)
+#define ZENOHC_API
+#endif
 #include <stdarg.h>
 #include <stdbool.h>
 #include <stdint.h>