1 files changed, 3 insertions, 3 deletions
diff --git a/utils.h b/utils.h
index 21b7272..7eb585b 100644
--- a/utils.h
+++ b/utils.h
@@ -15,8 +15,8 @@
  * along with toolbox.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-#ifndef UTILS_H_
-#define UTILS_H_
+#ifndef TOOLBOX_UTILS_H_
+#define TOOLBOX_UTILS_H_
 
 #ifdef __cplusplus
 extern "C" {
@@ -35,4 +35,4 @@ unsigned long long MillisNow(void);
 }  // extern "C"
 #endif  // __cplusplus
 
-#endif  // UTILS_H_
+#endif  // TOOLBOX_UTILS_H_