diff --git a/examples/advanced/psa_crypto/custom_atca_params.h b/examples/advanced/psa_crypto/custom_atca_params.h
index c3d4efbce4..33f879fc2e 100644
--- a/examples/advanced/psa_crypto/custom_atca_params.h
+++ b/examples/advanced/psa_crypto/custom_atca_params.h
@@ -6,6 +6,8 @@
  * directory for more details.
  */
 
+#pragma once
+
 /**
  * @ingroup     examples
  * @{
@@ -17,9 +19,6 @@
  * @author      Lena Boeckmann <lena.boeckmann@haw-hamburg.de>
  *
  */
-#ifndef CUSTOM_ATCA_PARAMS_H
-#define CUSTOM_ATCA_PARAMS_H
-
 #include "cryptoauthlib.h"
 #include "psa/crypto.h"
 
@@ -121,5 +120,4 @@ extern "C" {
 }
 #endif
 
-#endif /* CUSTOM_ATCA_PARAMS_H */
 /** @} */
diff --git a/examples/advanced/twr_aloha/control.h b/examples/advanced/twr_aloha/control.h
index 195a41c24b..2f751ff2be 100644
--- a/examples/advanced/twr_aloha/control.h
+++ b/examples/advanced/twr_aloha/control.h
@@ -6,6 +6,8 @@
  * directory for more details.
  */
 
+#pragma once
+
 /**
  * @ingroup     examples
  * @{
@@ -17,9 +19,6 @@
  * @}
  */
 
-#ifndef CONTROL_H
-#define CONTROL_H
-
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -115,5 +114,3 @@ uint32_t uwb_core_rng_req_remaining(void);
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* CONTROL_H */
diff --git a/examples/lang_support/official/riot_and_cpp/c_functions.h b/examples/lang_support/official/riot_and_cpp/c_functions.h
index 59365ef8f3..be7143908e 100644
--- a/examples/lang_support/official/riot_and_cpp/c_functions.h
+++ b/examples/lang_support/official/riot_and_cpp/c_functions.h
@@ -6,6 +6,8 @@
  * directory for more details.
  */
 
+#pragma once
+
 /**
  * @ingroup     examples
  * @{
@@ -19,9 +21,6 @@
 
 #include <stdio.h>
 
-#ifndef C_FUNCTIONS_H
-#define C_FUNCTIONS_H
-
 /*
  * all headers defining c functions must be marked as extern "C" when included
  * into c++ sources
@@ -51,4 +50,3 @@ int day_of_week(int day, int month, int year);
 #endif
 
 /** @} */
-#endif /* C_FUNCTIONS_H */
diff --git a/examples/lang_support/official/riot_and_cpp/cpp_class.hpp b/examples/lang_support/official/riot_and_cpp/cpp_class.hpp
index 353cd72f71..add37d54fd 100644
--- a/examples/lang_support/official/riot_and_cpp/cpp_class.hpp
+++ b/examples/lang_support/official/riot_and_cpp/cpp_class.hpp
@@ -7,6 +7,8 @@
  * directory for more details.
  */
 
+#pragma once
+
 /**
  * @defgroup
  * @brief
@@ -20,9 +22,6 @@
  * @author      DangNhat Pham-Huu <51002279@stu.hcmut.edu.vn>
  */
 
-#ifndef CPP_CLASS_H
-#define CPP_CLASS_H
-
 #include <cstdio>
 
 class cpp_class
@@ -60,4 +59,3 @@ private:
 };
 
 /** @} */
-#endif /* CPP_CLASS_H */
diff --git a/examples/networking/coap/gcoap/gcoap_example.h b/examples/networking/coap/gcoap/gcoap_example.h
index 79c0c701c2..d7680cd2fe 100644
--- a/examples/networking/coap/gcoap/gcoap_example.h
+++ b/examples/networking/coap/gcoap/gcoap_example.h
@@ -6,6 +6,8 @@
  * details.
  */
 
+#pragma once
+
 /**
  * @ingroup     examples
  * @{
@@ -16,9 +18,6 @@
  * @author      Ken Bannister <kb2ma@runbox.com>
  */
 
-#ifndef GCOAP_EXAMPLE_H
-#define GCOAP_EXAMPLE_H
-
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -53,5 +52,4 @@ void notify_observers(void);
 }
 #endif
 
-#endif /* GCOAP_EXAMPLE_H */
 /** @} */
diff --git a/examples/networking/coap/gcoap_dtls/gcoap_example.h b/examples/networking/coap/gcoap_dtls/gcoap_example.h
index eeb6839040..8a4434e288 100644
--- a/examples/networking/coap/gcoap_dtls/gcoap_example.h
+++ b/examples/networking/coap/gcoap_dtls/gcoap_example.h
@@ -6,6 +6,8 @@
  * details.
  */
 
+#pragma once
+
 /**
  * @ingroup     examples
  * @{
@@ -16,9 +18,6 @@
  * @author      Ken Bannister <kb2ma@runbox.com>
  */
 
-#ifndef GCOAP_EXAMPLE_H
-#define GCOAP_EXAMPLE_H
-
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -61,5 +60,4 @@ void notify_observers(void);
 }
 #endif
 
-#endif /* GCOAP_EXAMPLE_H */
 /** @} */
diff --git a/examples/networking/coap/gcoap_dtls/tinydtls_keys.h b/examples/networking/coap/gcoap_dtls/tinydtls_keys.h
index cc741865ed..c3fab9382f 100644
--- a/examples/networking/coap/gcoap_dtls/tinydtls_keys.h
+++ b/examples/networking/coap/gcoap_dtls/tinydtls_keys.h
@@ -6,6 +6,8 @@
  * directory for more details.
  */
 
+#pragma once
+
 /**
  * @ingroup     examples
  * @{
@@ -18,9 +20,6 @@
  * @}
  */
 
-#ifndef TINYDTLS_KEYS_H
-#define TINYDTLS_KEYS_H
-
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -59,5 +58,3 @@ static const unsigned char ecdsa_pub_key_y[] = {
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* TINYDTLS_KEYS_H */
diff --git a/examples/networking/dtls/dtls-echo/tinydtls_keys.h b/examples/networking/dtls/dtls-echo/tinydtls_keys.h
index 0cb86e63c6..aaeba8be43 100644
--- a/examples/networking/dtls/dtls-echo/tinydtls_keys.h
+++ b/examples/networking/dtls/dtls-echo/tinydtls_keys.h
@@ -6,6 +6,8 @@
  * directory for more details.
  */
 
+#pragma once
+
 /**
  * @ingroup     examples
  * @{
@@ -18,9 +20,6 @@
  * @}
  */
 
-#ifndef TINYDTLS_KEYS_H
-#define TINYDTLS_KEYS_H
-
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -62,5 +61,3 @@ static const unsigned char ecdsa_pub_key_y[] = {
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* TINYDTLS_KEYS_H */
diff --git a/examples/networking/dtls/dtls-sock/dtls_client_credentials.h b/examples/networking/dtls/dtls-sock/dtls_client_credentials.h
index 00cc1e4ff7..52643f942e 100644
--- a/examples/networking/dtls/dtls-sock/dtls_client_credentials.h
+++ b/examples/networking/dtls/dtls-sock/dtls_client_credentials.h
@@ -6,6 +6,8 @@
  * directory for more details.
  */
 
+#pragma once
+
 /**
  * @ingroup     examples
  * @{
@@ -18,9 +20,6 @@
  * @}
  */
 
-#ifndef DTLS_CLIENT_CREDENTIALS_H
-#define DTLS_CLIENT_CREDENTIALS_H
-
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -135,5 +134,3 @@ static const unsigned char known_server_public_key_1_y[] = {
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* DTLS_CLIENT_CREDENTIALS_H */
diff --git a/examples/networking/dtls/dtls-sock/dtls_server_credentials.h b/examples/networking/dtls/dtls-sock/dtls_server_credentials.h
index cb4bb26b41..b03dab2078 100644
--- a/examples/networking/dtls/dtls-sock/dtls_server_credentials.h
+++ b/examples/networking/dtls/dtls-sock/dtls_server_credentials.h
@@ -6,6 +6,8 @@
  * directory for more details.
  */
 
+#pragma once
+
 /**
  * @ingroup     examples
  * @{
@@ -18,9 +20,6 @@
  * @}
  */
 
-#ifndef DTLS_SERVER_CREDENTIALS_H
-#define DTLS_SERVER_CREDENTIALS_H
-
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -131,5 +130,3 @@ static const unsigned char known_client_public_key_0_y[] = {
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* DTLS_SERVER_CREDENTIALS_H */
diff --git a/examples/networking/misc/lwm2m/credentials.h b/examples/networking/misc/lwm2m/credentials.h
index c48f5aa544..044db2bce9 100644
--- a/examples/networking/misc/lwm2m/credentials.h
+++ b/examples/networking/misc/lwm2m/credentials.h
@@ -6,6 +6,8 @@
  * directory for more details.
  */
 
+#pragma once
+
 /**
  * @ingroup     examples
  * @{
@@ -18,9 +20,6 @@
  * @}
  */
 
-#ifndef CREDENTIALS_H
-#define CREDENTIALS_H
-
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -75,5 +74,3 @@ static const uint8_t server_rpk_pub[] = {
 #ifdef __cplusplus
 }
 #endif
-
-#endif /* CREDENTIALS_H */