diff --git a/libkmod/libkmod-array.h b/libkmod/libkmod-array.h
index 6400993..dd2ba55 100644
--- a/libkmod/libkmod-array.h
+++ b/libkmod/libkmod-array.h
@@ -1,5 +1,4 @@
-#ifndef _LIBKMOD_ARRAY_H_
-#define _LIBKMOD_ARRAY_H_
+#pragma once
 
 /*
  * Declaration of struct array is in header because we may want to embed the
@@ -19,5 +18,3 @@ void array_pop(struct array *array);
 void array_free_array(struct array *array);
 void array_sort(struct array *array, int (*cmp)(const void *a, const void *b));
 int array_remove_at(struct array *array, unsigned int pos);
-
-#endif
diff --git a/libkmod/libkmod-hash.h b/libkmod/libkmod-hash.h
index 8f20b8f..ca0af05 100644
--- a/libkmod/libkmod-hash.h
+++ b/libkmod/libkmod-hash.h
@@ -1,5 +1,4 @@
-#ifndef _LIBKMOD_HASH_H_
-#define _LIBKMOD_HASH_H_
+#pragma once
 
 #include <stdbool.h>
 
@@ -21,5 +20,3 @@ unsigned int hash_get_count(const struct hash *hash);
 void hash_iter_init(const struct hash *hash, struct hash_iter *iter);
 bool hash_iter_next(struct hash_iter *iter, const char **key,
 							const void **value);
-
-#endif
diff --git a/libkmod/libkmod-index.h b/libkmod/libkmod-index.h
index dd3a762..6eb77b9 100644
--- a/libkmod/libkmod-index.h
+++ b/libkmod/libkmod-index.h
@@ -18,8 +18,7 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#ifndef _LIBKMOD_INDEX_H
-#define _LIBKMOD_INDEX_H
+#pragma once
 
 #include <stdint.h>
 
@@ -127,5 +126,3 @@ void index_mm_close(struct index_mm *index);
 char *index_mm_search(struct index_mm *idx, const char *key);
 struct index_value *index_mm_searchwild(struct index_mm *idx, const char *key);
 void index_mm_dump(struct index_mm *idx, int fd, const char *prefix);
-
-#endif
diff --git a/libkmod/libkmod-private.h b/libkmod/libkmod-private.h
index 7c2602d..9061854 100644
--- a/libkmod/libkmod-private.h
+++ b/libkmod/libkmod-private.h
@@ -1,5 +1,4 @@
-#ifndef _LIBKMOD_PRIVATE_H_
-#define _LIBKMOD_PRIVATE_H_
+#pragma once
 
 #include <stdbool.h>
 #include <stdio.h>
@@ -170,5 +169,3 @@ int kmod_elf_get_section(const struct kmod_elf *elf, const char *section, const
 
 /* util functions */
 #include "libkmod-util.h"
-
-#endif
diff --git a/libkmod/libkmod-util.h b/libkmod/libkmod-util.h
index 7130ae0..5fe3e02 100644
--- a/libkmod/libkmod-util.h
+++ b/libkmod/libkmod-util.h
@@ -1,6 +1,4 @@
-#ifndef _LIBKMOD_UTIL_H_
-#define _LIBKMOD_UTIL_H_
-
+#pragma once
 #include "macro.h"
 
 #include <limits.h>
@@ -42,5 +40,3 @@ do {						\
 	} *__p = (typeof(__p)) (ptr);		\
 	__p->__v = (val);			\
 } while(0)
-
-#endif
diff --git a/libkmod/libkmod.h b/libkmod/libkmod.h
index f907e1d..2f813a8 100644
--- a/libkmod/libkmod.h
+++ b/libkmod/libkmod.h
@@ -18,6 +18,7 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
+#pragma once
 #ifndef _LIBKMOD_H_
 #define _LIBKMOD_H_
 
diff --git a/libkmod/macro.h b/libkmod/macro.h
index e5c9763..689c57a 100644
--- a/libkmod/macro.h
+++ b/libkmod/macro.h
@@ -17,9 +17,7 @@
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
-
-#ifndef _LIBKMOD_MACRO_H_
-#define _LIBKMOD_MACRO_H_
+#pragma once
 
 #include <stddef.h>
 
@@ -82,5 +80,3 @@
 #define _printf_format_(a,b) __attribute__((format (printf, a, b)))
 #define _unused_ __attribute__((unused))
 #define _always_inline_ __inline__ __attribute__((always_inline))
-
-#endif
diff --git a/testsuite/mkdir.h b/testsuite/mkdir.h
index 2530bd7..35f6a1d 100644
--- a/testsuite/mkdir.h
+++ b/testsuite/mkdir.h
@@ -16,12 +16,9 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#ifndef _LIBKMOD_TESTSUITE_MKDIR_
-#define _LIBKMOD_TESTSUITE_MKDIR_
+#pragma once
 
 #include <sys/stat.h>
 #include <sys/types.h>
 
 int mkdir_p(const char *path, mode_t mode);
-
-#endif
diff --git a/testsuite/stripped-module.h b/testsuite/stripped-module.h
index 19862f3..83986b2 100644
--- a/testsuite/stripped-module.h
+++ b/testsuite/stripped-module.h
@@ -1,5 +1,4 @@
-#ifndef _TESTSUITE_STRIPPED_MODULE_H
-#define _TESTSUITE_STRIPPED_MODULE_H
+#pragma once
 
 enum module_state
 {
@@ -28,5 +27,3 @@ struct module
 /*                                padding */
 #define MODULE_NAME_OFFSET_64 4 + 4           + 2 * 8
 #define MODULE_NAME_OFFSET_32 4 + 2 * 4
-
-#endif
diff --git a/testsuite/testsuite.h b/testsuite/testsuite.h
index 1666054..1f8eb6e 100644
--- a/testsuite/testsuite.h
+++ b/testsuite/testsuite.h
@@ -16,8 +16,7 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#ifndef _LIBKMOD_TESTSUITE_
-#define _LIBKMOD_TESTSUITE_
+#pragma once
 
 #include <stdbool.h>
 #include <stdarg.h>
@@ -144,6 +143,4 @@ int test_run(const struct test *t);
 		exit(EXIT_SUCCESS);				\
 	}							\
 
-#endif
-
 #define __noreturn __attribute__((noreturn))
diff --git a/tools/kmod.h b/tools/kmod.h
index 8717aec..76a3426 100644
--- a/tools/kmod.h
+++ b/tools/kmod.h
@@ -17,8 +17,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef _KMOD_MACRO_H_
-#define _KMOD_MACRO_H_
+#pragma once
 
 #include "macro.h"
 
@@ -36,4 +35,3 @@ extern const struct kmod_cmd kmod_cmd_compat_modprobe;
 extern const struct kmod_cmd kmod_cmd_compat_depmod;
 
 extern const struct kmod_cmd kmod_cmd_list;
-#endif