diff --git a/src/meson.build b/src/meson.build
index b367dc4..ab786c0 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -50,6 +50,7 @@
   'hash.cpp',
   'hash/array.cpp',
   'hash/tuple.cpp',
+  'numeric/endian.cpp',
   'pinned.cpp',
   'raw.cpp',
   'signal.cpp',
diff --git a/src/numeric/endian.cpp b/src/numeric/endian.cpp
new file mode 100644
index 0000000..97600cf
--- /dev/null
+++ b/src/numeric/endian.cpp
@@ -0,0 +1 @@
+#include <stdplus/numeric/endian.hpp>