diff --git a/modeshape-common/src/main/java/org/modeshape/common/text/Inflector.java b/modeshape-common/src/main/java/org/modeshape/common/text/Inflector.java
index c57ffa0e0a..6ea836c668 100644
--- a/modeshape-common/src/main/java/org/modeshape/common/text/Inflector.java
+++ b/modeshape-common/src/main/java/org/modeshape/common/text/Inflector.java
@@ -555,7 +555,7 @@ protected void initialize() {
         inflect.addSingularize("([^aeiouy]|qu)ies$", "$1y");
         inflect.addSingularize("(s)eries$", "$1eries");
         inflect.addSingularize("(m)ovies$", "$1ovie");
-        inflect.addSingularize("(x|ch|ss|sh)es$", "$1");
+        inflect.addSingularize("(x|z|ch|ss|sh)es$", "$1");
         inflect.addSingularize("([m|l])ice$", "$1ouse");
         inflect.addSingularize("(bus)es$", "$1");
         inflect.addSingularize("(o)es$", "$1");