diff --git a/src/ron_enc.rs b/src/ron_enc.rs
index 6b8ebf5..d420fb0 100644
--- a/src/ron_enc.rs
+++ b/src/ron_enc.rs
@@ -9,7 +9,7 @@ pub type DeserializeError = de::Error;
 pub fn serialize<T>(value: &T) -> ser::Result<String>
     where T: Serialize
 {
-    ser::to_string(value)
+    ser::pretty::to_string(value)
 }
 
 pub fn deserialize<T, I>(bytes: &I) -> Result<T, ::error::BreakError>