diff --git a/src/include/units/physical/si.h b/src/include/units/physical/si.h
index 106860e7..d5c7b5e2 100644
--- a/src/include/units/physical/si.h
+++ b/src/include/units/physical/si.h
@@ -24,9 +24,9 @@
 
 #include "si/absorbed_dose.h"
 #include "si/acceleration.h"
-#include "si/area.h"
 #include "si/angle.h"
 #include "si/angular_velocity.h"
+#include "si/area.h"
 #include "si/capacitance.h"
 #include "si/catalytic_activity.h"
 #include "si/charge_density.h"