diff --git a/doc/specs/thrift-compact-protocol.md b/doc/specs/thrift-compact-protocol.md
index 02467dd..6be2a62 100644
--- a/doc/specs/thrift-compact-protocol.md
+++ b/doc/specs/thrift-compact-protocol.md
@@ -97,8 +97,9 @@
 ### Double encoding
 
 Values of type `double` are first converted to an int64 according to the IEEE 754 floating-point "double format" bit
-layout. Most run-times provide a library to make this conversion. Both the binary protocol as the compact protocol then
-encode the int64 in 8 bytes in big endian order.
+layout. Most run-times provide a library to make this conversion. But while the binary protocol encodes the int64 
+in 8 bytes in big endian order, the compact protocol encodes it in little endian order - this is due to an early 
+implementation bug that finally became the de-facto standard.
 
 ### Boolean encoding