diff --git a/sofp-src/sofp-nameless-functions.lyx b/sofp-src/sofp-nameless-functions.lyx
index f3633c0ff..297943fc0 100644
--- a/sofp-src/sofp-nameless-functions.lyx
+++ b/sofp-src/sofp-nameless-functions.lyx
@@ -4956,7 +4956,7 @@ status open
 
 \begin_layout Plain Layout
 
-def isPrime(n: Int): Boolean =
+def isPrime(n: Int): Boolean = {
 \end_layout
 
 \begin_layout Plain Layout
@@ -4974,6 +4974,11 @@ def isPrime(n: Int): Boolean =
     .forall(k =>  n % k != 0)
 \end_layout
 
+\begin_layout Plain Layout
+
+}
+\end_layout
+
 \end_inset