Fix spelling error.

diff --git a/Report/Main/Problems/Challenges.tex b/Report/Main/Problems/Challenges.tex
index e152393873c4ae8fc08b59bf874c693ce7723166..15cf290a487187cc5e3e2c96d703bc57d12467ad 100644 (file)
--- a/Report/Main/Problems/Challenges.tex
+++ b/Report/Main/Problems/Challenges.tex
@@ -111,7 +111,7 @@ function call for each, we can still distinguish between all the
 different operations and add extra arguments where needed.
 
 \subsubsection{What do we have now?}
-The result of this work is a usuable, but conservative, specification. It
+The result of this work is a usable, but conservative, specification. It
 defines the subset of features that should certainly be supported. In practice,
 some other features will also work, but not reliably. Therefore, these are left
 out of the specification.