diff --git a/aspUnify.tex b/aspUnify.tex
index fef62c8..cc059c2 100644
--- a/aspUnify.tex
+++ b/aspUnify.tex
@@ -313,6 +313,12 @@ described in chapter \ref{sec:translation}.
     \type{T}_i \doteq \type{T}_i 
 }
 \and
+\inferrule[Unfold']{
+    \tv{b} \lessdot \exptype{C}{\type{T}_1 \ldots \type{T}_n}
+}{
+    \type{T}_i \doteq \type{T}_i
+}
+\and
 \inferrule[Subst-Param]{
     \type{T}' \doteq \type{S} \\
     \type{T} \doteq \exptype{C}{\type{T}_1 \ldots, \type{T}', \ldots \type{T}_n} \\