diff --git a/ivy/src/main/scala/sbt/StringUtilities.scala b/ivy/src/main/scala/sbt/StringUtilities.scala
index b86427449..caf373d3b 100644
--- a/ivy/src/main/scala/sbt/StringUtilities.scala
+++ b/ivy/src/main/scala/sbt/StringUtilities.scala
@@ -3,10 +3,12 @@
  */
 package sbt
 
+import java.util.Locale
+
 object StringUtilities
 {
 	@deprecated("Different use cases require different normalization.  Use Project.normalizeModuleID or normalizeProjectID instead.", "0.13.0")
-	def normalize(s: String) = s.toLowerCase.replaceAll("""\W+""", "-")
+	def normalize(s: String) = s.toLowerCase(Locale.ENGLISH).replaceAll("""\W+""", "-")
 	def nonEmpty(s: String, label: String)
 	{
 		require(s.trim.length > 0, label + " cannot be empty.")