diff --git a/benchmarks/util.h b/benchmarks/util.h
index 3225bc2..d9e10f4 100644
--- a/benchmarks/util.h
+++ b/benchmarks/util.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _BIONIC_BENCHMARKS_UTIL_H_
-#define _BIONIC_BENCHMARKS_UTIL_H_
+#pragma once
 
 #include <map>
 #include <mutex>
@@ -62,5 +61,3 @@
 char* GetAlignedPtrFilled(std::vector<char>* buf, size_t alignment, size_t nbytes, char fill_byte);
 
 bool LockToCPU(long cpu_to_lock);
-
-#endif // _BIONIC_BENCHMARKS_UTIL_H