diff --git a/mission/controller/acs/Navigation.cpp b/mission/controller/acs/Navigation.cpp
index 7c822409..7d60a531 100644
--- a/mission/controller/acs/Navigation.cpp
+++ b/mission/controller/acs/Navigation.cpp
@@ -1,5 +1,6 @@
 #include "Navigation.h"
 
+#include <fsfw/coordinates/Sgp4Propagator.h>
 #include <fsfw/globalfunctions/math/MatrixOperations.h>
 #include <fsfw/globalfunctions/math/QuaternionOperations.h>
 #include <fsfw/globalfunctions/math/VectorOperations.h>