diff --git a/src/modules/position_estimator_inav/position_estimator_inav_main.c b/src/modules/position_estimator_inav/position_estimator_inav_main.c
index 892e50f3a1..77cb75073c 100644
--- a/src/modules/position_estimator_inav/position_estimator_inav_main.c
+++ b/src/modules/position_estimator_inav/position_estimator_inav_main.c
@@ -39,6 +39,7 @@
  * @author Nuno Marques <n.marques21@hotmail.com>
  */
 
+#include <px4_posix.h>
 #include <unistd.h>
 #include <stdlib.h>
 #include <stdio.h>