diff --git a/docs/pages/release_notes.md b/docs/pages/release_notes.md
index 6e16ecf35d..e87cea0567 100644
--- a/docs/pages/release_notes.md
+++ b/docs/pages/release_notes.md
@@ -29,6 +29,7 @@ This is a minor release.
 ### Fixed Issues
 *   all
     *   [#1168](https://github.com/pmd/pmd/issues/1168): \[core] xml renderer schema definitions (#538) break included xslt files
+    *   [#1173](https://github.com/pmd/pmd/issues/1173): \[core] Some characters in CPD are not shown correctly.
 *   ecmascript
     *   [#861](https://github.com/pmd/pmd/issues/861): \[ecmascript] InnaccurateNumericLiteral false positive with hex literals
 *   java-bestpractices
diff --git a/pmd-core/src/main/java/net/sourceforge/pmd/cpd/GUI.java b/pmd-core/src/main/java/net/sourceforge/pmd/cpd/GUI.java
index c51770960f..c6e7c4727b 100644
--- a/pmd-core/src/main/java/net/sourceforge/pmd/cpd/GUI.java
+++ b/pmd-core/src/main/java/net/sourceforge/pmd/cpd/GUI.java
@@ -631,7 +631,7 @@ public class GUI implements CPDListener {
             int separatorPos = sourceId.lastIndexOf(File.separatorChar);
             label = "..." + sourceId.substring(separatorPos);
         } else {
-            label = '(' + sourceIDs.size() + " separate files)";
+            label = String.format("(%d separate files)", sourceIDs.size());
         }
 
         match.setLabel(label);