diff --git a/Numerics/src/Integer/Types.qs b/Numerics/src/Integer/Types.qs
index 51632f972df..a8385183430 100644
--- a/Numerics/src/Integer/Types.qs
+++ b/Numerics/src/Integer/Types.qs
@@ -4,5 +4,6 @@
 namespace Microsoft.Quantum.Arithmetic {
     /// # Summary
     /// Type of a signed integer stored in little endian (see LittleEndian).
+    /// Negative numbers are stored using two's complement.
     newtype SignedLittleEndian = LittleEndian;
-}
\ No newline at end of file
+}