diff --git a/src/tests/rec_fibo.lambda b/src/tests/rec_fibo.lambda
index e40da19..7e2f5db 100644
--- a/src/tests/rec_fibo.lambda
+++ b/src/tests/rec_fibo.lambda
@@ -14,12 +14,12 @@ let fibo = fun n ->
         fibo_inner 2 1 1
     in
 
-let x = print fibo 0 in
-let x = print fibo 1 in
-let x = print fibo 2 in
-let x = print fibo 3 in
-let x = print fibo 4 in
-let x = print fibo 5 in
-let x = print fibo 6 in
-let x = print fibo 7 in
-print fibo 8
+let x = print (fibo 0) in
+let x = print (fibo 1) in
+let x = print (fibo 2) in
+let x = print (fibo 3) in
+let x = print (fibo 4) in
+let x = print (fibo 5) in
+let x = print (fibo 6) in
+let x = print (fibo 7) in
+print (fibo 8)