diff --git a/wpimath/src/main/native/include/units/radiation.h b/wpimath/src/main/native/include/units/radiation.h
index 7b4f58aa29..84f8eeddd5 100644
--- a/wpimath/src/main/native/include/units/radiation.h
+++ b/wpimath/src/main/native/include/units/radiation.h
@@ -35,6 +35,7 @@
 #include "units/base.h"
 #include "units/energy.h"
 #include "units/frequency.h"
+#include "units/mass.h"
 
 namespace units {
 /**