diff --git a/source/coral/io.cpp b/source/coral/io.cpp
index 3e361a1..1191720 100755
--- a/source/coral/io.cpp
+++ b/source/coral/io.cpp
@@ -245,5 +245,6 @@ export namespace coral {
 
 	template<typename... arguments> expected<usize, io_error> println(writer & output, arguments... print_arguments) {
 		// TODO: Implement.
+		return 0;
 	}
 }