diff --git a/matsim/src/main/java/org/matsim/analysis/IterationStopWatch.java b/matsim/src/main/java/org/matsim/analysis/IterationStopWatch.java
index 54a5b57a05e..4f3ea2eeadb 100644
--- a/matsim/src/main/java/org/matsim/analysis/IterationStopWatch.java
+++ b/matsim/src/main/java/org/matsim/analysis/IterationStopWatch.java
@@ -191,7 +191,7 @@ public void writeSeparatedFile(final String filename, final String delimiter) {
 		try (BufferedWriter writer = IOUtils.getBufferedWriter(filename)) {
 
 			// print header
-			writer.write("iteration");
+			writer.write("Iteration");
 			for (String identifier : this.identifiers) {
 				writer.write(delimiter);
 				writer.write(identifier);