diff --git a/EKF/RingBuffer.h b/EKF/RingBuffer.h
index 5c453bc87f..00ab9efaf8 100644
--- a/EKF/RingBuffer.h
+++ b/EKF/RingBuffer.h
@@ -37,7 +37,6 @@
  * Template RingBuffer.
  */
 
-#define __STDC_FORMAT_MACROS
 #include <inttypes.h>
 #include <cstdio>
 #include <cstring>
diff --git a/EKF/estimator_interface.cpp b/EKF/estimator_interface.cpp
index 1474c84493..fdd2e0117c 100644
--- a/EKF/estimator_interface.cpp
+++ b/EKF/estimator_interface.cpp
@@ -40,7 +40,6 @@
  * @author Siddharth B Purohit <siddharthbharatpurohit@gmail.com>
  */
 
-#define __STDC_FORMAT_MACROS
 #include <inttypes.h>
 #include <math.h>
 #include "../ecl.h"