diff --git a/src/core/core.cpp b/src/core/core.cpp
index 02a5a9206..00fd78917 100644
--- a/src/core/core.cpp
+++ b/src/core/core.cpp
@@ -41,6 +41,7 @@ export
 #include <units/generic/angle.h>
 #include <units/generic/dimensionless.h>
 #include <units/generic/solid_angle.h>
+#include <units/isq/si/prefixes.h>
 #include <units/kind.h>
 #include <units/magnitude.h>
 #include <units/math.h>