diff --git a/src/lib/launchdetection/CatapultLaunchMethod.cpp b/src/lib/launchdetection/CatapultLaunchMethod.cpp
index 273da3ee76..8a0e8a3bb3 100644
--- a/src/lib/launchdetection/CatapultLaunchMethod.cpp
+++ b/src/lib/launchdetection/CatapultLaunchMethod.cpp
@@ -41,6 +41,7 @@
 
 #include "CatapultLaunchMethod.h"
 #include <systemlib/err.h>
+#define __STDC_FORMAT_MACROS 1
 #include <inttypes.h>
 
 namespace launchdetection
diff --git a/src/platforms/posix/drivers/gpssim/gpssim.cpp b/src/platforms/posix/drivers/gpssim/gpssim.cpp
index 3115ecb63e..d94fc35f8a 100644
--- a/src/platforms/posix/drivers/gpssim/gpssim.cpp
+++ b/src/platforms/posix/drivers/gpssim/gpssim.cpp
@@ -37,6 +37,7 @@
  */
 
 #include <sys/types.h>
+#define __STDC_FORMAT_MACROS
 #include <inttypes.h>
 #include <stdio.h>
 #include <stdbool.h>