diff --git a/src/main/org/apache/tools/ant/taskdefs/MakeUrl.java b/src/main/org/apache/tools/ant/taskdefs/MakeUrl.java
index 4dbc35ef8..39aa70338 100644
--- a/src/main/org/apache/tools/ant/taskdefs/MakeUrl.java
+++ b/src/main/org/apache/tools/ant/taskdefs/MakeUrl.java
@@ -75,7 +75,7 @@ public class MakeUrl extends Task {
 
     // error message strings
     /** Missing file */
-    public static final String ERROR_MISSING_FILE = "A source file is missing :";
+    public static final String ERROR_MISSING_FILE = "A source file is missing: ";
     /** No property defined */
     public static final String ERROR_NO_PROPERTY = "No property defined";
     /** No files defined */