diff --git a/ant_tasks/source/java/ch/systemsx/cisd/ant/common/StringUtils.java b/ant_tasks/source/java/ch/systemsx/cisd/ant/common/StringUtils.java
index 680474b75e5bfef9cfb910d77eaac91a76ca839a..86b91fd8ccef4165235c6d1a50faf3659fa0e24c 100644
--- a/ant_tasks/source/java/ch/systemsx/cisd/ant/common/StringUtils.java
+++ b/ant_tasks/source/java/ch/systemsx/cisd/ant/common/StringUtils.java
@@ -110,12 +110,12 @@ public final class StringUtils
         {
             return null;
         }
-        if (!iterator.hasNext())
+        if (iterator.hasNext() == false)
         {
             return EMPTY;
         }
         Object first = iterator.next();
-        if (!iterator.hasNext())
+        if (iterator.hasNext() == false)
         {
             return toString(first);
         }