add missing #pragma once to header files
diff --git a/src/protocol/diag_log_gprs_mac.h b/src/protocol/diag_log_gprs_mac.h
index cc499b3..536128d 100644
--- a/src/protocol/diag_log_gprs_mac.h
+++ b/src/protocol/diag_log_gprs_mac.h
@@ -1,3 +1,5 @@
+#pragma once
+
 #include <stdint.h>
 
 enum gprs_mac_mode {
diff --git a/src/protocol/diag_log_gprs_rlc.h b/src/protocol/diag_log_gprs_rlc.h
index d577c8d..31d5eaf 100644
--- a/src/protocol/diag_log_gprs_rlc.h
+++ b/src/protocol/diag_log_gprs_rlc.h
@@ -1,3 +1,5 @@
+#pragma once
+
 #include <stdint.h>
 
 /* LOG_GPRS_RLC_UL_ABNRML_RLS_COUNTS_C */