diff --git a/Project.toml b/Project.toml
index ff37203..9338354 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "OnlineStatsBase"
 uuid = "925886fa-5bf2-5e8e-b522-a9147a512338"
-version = "1.2.6"
+version = "1.2.7"
 
 [deps]
 Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"
diff --git a/src/part.jl b/src/part.jl
index 66b4d8a..8e32248 100644
--- a/src/part.jl
+++ b/src/part.jl
@@ -21,8 +21,6 @@ end
 
 Base.diff(a::Part, b::Part) = diff(a.domain, b.domain)
 
-
-
 #-----------------------------------------------------------------------------#
 #-----------------------------------------------------------------------------# Domains
 #-----------------------------------------------------------------------------#
@@ -64,7 +62,7 @@ Base.show(io::IO, b::ClosedInterval) = print(io, "ClosedInterval: [$(b.first), $
 Base.in(x, bucket::ClosedInterval) = bucket.first ≤ x ≤ bucket.last
 Base.isless(a::ClosedInterval, b::ClosedInterval) = isless(a.first, b.first)
 function Base.diff(a::ClosedInterval, b::ClosedInterval) 
-    a < b ? _value(b.last) - _value(a.first) : _value(a.last) - _value(b.first)
+    a < b ? _value(b.first) - _value(a.last) : _value(a.first) - _value(b.last)
 end
 
 _value(x) = x