diff --git a/exercises/06/vslc/vsl_programs/ps5-codegen1/function_call.vsl b/exercises/06/vslc/vsl_programs/ps5-codegen1/function_call.vsl
index 5bd29ec..6a4e715 100644
--- a/exercises/06/vslc/vsl_programs/ps5-codegen1/function_call.vsl
+++ b/exercises/06/vslc/vsl_programs/ps5-codegen1/function_call.vsl
@@ -6,4 +6,5 @@ end
 func main() 
 begin
     print 2 + add(40, 2) + 2
+    return 0
 end
\ No newline at end of file
diff --git a/exercises/06/vslc/vsl_programs/ps5-codegen1/helloworld.vsl b/exercises/06/vslc/vsl_programs/ps5-codegen1/helloworld.vsl
index 49219f8..0775dea 100644
--- a/exercises/06/vslc/vsl_programs/ps5-codegen1/helloworld.vsl
+++ b/exercises/06/vslc/vsl_programs/ps5-codegen1/helloworld.vsl
@@ -1,3 +1,4 @@
 func main() begin
     print "Hello, World!"
+    return 0
 end
\ No newline at end of file
diff --git a/exercises/06/vslc/vsl_programs/ps5-codegen1/shadow.vsl b/exercises/06/vslc/vsl_programs/ps5-codegen1/shadow.vsl
index 7995200..b3972cf 100644
--- a/exercises/06/vslc/vsl_programs/ps5-codegen1/shadow.vsl
+++ b/exercises/06/vslc/vsl_programs/ps5-codegen1/shadow.vsl
@@ -21,4 +21,5 @@ func main() begin
         print a
     end
     print b
+    return 0
 end
\ No newline at end of file