diff --git a/include/villas/hooks.h b/include/villas/hooks.h
index e4e6dd68d..e26d4e8e0 100644
--- a/include/villas/hooks.h
+++ b/include/villas/hooks.h
@@ -18,8 +18,7 @@
  * @{
  *********************************************************************************/
  
-#ifndef _HOOKS_H_
-#define _HOOKS_H_
+#pragma once
 
 #include <time.h>
 #include <string.h>
diff --git a/include/villas/queue.h b/include/villas/queue.h
index 654ee4a49..3b42989be 100644
--- a/include/villas/queue.h
+++ b/include/villas/queue.h
@@ -31,6 +31,8 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#pragma once
+
 #include <stdint.h>
 #include <stdatomic.h>