diff --git a/deft4j-cmd/src/main/java/com/github/NeRdTheNed/deft4j/cmd/OptimiseFolder.java b/deft4j-cmd/src/main/java/com/github/NeRdTheNed/deft4j/cmd/OptimiseFolder.java
index 49aef40..c5d06d9 100644
--- a/deft4j-cmd/src/main/java/com/github/NeRdTheNed/deft4j/cmd/OptimiseFolder.java
+++ b/deft4j-cmd/src/main/java/com/github/NeRdTheNed/deft4j/cmd/OptimiseFolder.java
@@ -38,8 +38,11 @@ public Integer call() throws Exception {
                     continue;
                 }
 
+                System.out.println("Optimising file " + overwriteInput);
+
                 try {
                     if (!deft.optimiseFile(overwriteInput, overwriteInput, null, false)) {
+                        System.err.println("Error when optimising file " + overwriteInput);
                         didOpt = false;
                     }
                 } catch (final Exception e) {