diff --git a/src/main/debug.h b/src/main/debug.h
index 2e2a90e89c..6ebbba735a 100644
--- a/src/main/debug.h
+++ b/src/main/debug.h
@@ -15,6 +15,8 @@
  * along with Cleanflight.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#pragma once
+
 #define DEBUG16_VALUE_COUNT 4
 extern int16_t debug[DEBUG16_VALUE_COUNT];
 extern uint8_t debugMode;