diff --git a/src/de/unihd/dbs/uima/annotator/heideltime/resources/NormalizationManager.java b/src/de/unihd/dbs/uima/annotator/heideltime/resources/NormalizationManager.java
index 505ad500..d0a8ac97 100644
--- a/src/de/unihd/dbs/uima/annotator/heideltime/resources/NormalizationManager.java
+++ b/src/de/unihd/dbs/uima/annotator/heideltime/resources/NormalizationManager.java
@@ -71,7 +71,7 @@ private NormalizationManager(String language) {
 	 * @return singleton instance of NormalizationManager
 	 */
 	public static NormalizationManager getInstance(Language language) {
-		if(!instances.containsKey(language)) {
+		if(!instances.containsKey(language.getName())) {
 			NormalizationManager nm = new NormalizationManager(language.getResourceFolder());
 			instances.put(language.getName(), nm);
 		}
diff --git a/src/de/unihd/dbs/uima/annotator/heideltime/resources/RePatternManager.java b/src/de/unihd/dbs/uima/annotator/heideltime/resources/RePatternManager.java
index 87608a98..0844a4e1 100644
--- a/src/de/unihd/dbs/uima/annotator/heideltime/resources/RePatternManager.java
+++ b/src/de/unihd/dbs/uima/annotator/heideltime/resources/RePatternManager.java
@@ -52,7 +52,7 @@ private RePatternManager(String language) {
 	 * @return singleton instance of RePatternManager
 	 */
 	public static RePatternManager getInstance(Language language) {
-		if(!instances.containsKey(language)) {
+		if(!instances.containsKey(language.getName())) {
 			RePatternManager nm = new RePatternManager(language.getResourceFolder());
 			instances.put(language.getName(), nm);
 		}
diff --git a/src/de/unihd/dbs/uima/annotator/heideltime/resources/RuleManager.java b/src/de/unihd/dbs/uima/annotator/heideltime/resources/RuleManager.java
index 98efb5e8..d34fb7f4 100644
--- a/src/de/unihd/dbs/uima/annotator/heideltime/resources/RuleManager.java
+++ b/src/de/unihd/dbs/uima/annotator/heideltime/resources/RuleManager.java
@@ -102,7 +102,7 @@ protected RuleManager(String language) {
 	 * @return singleton instance of RuleManager
 	 */
 	public static RuleManager getInstance(Language language) {
-		if(!instances.containsKey(language)) {
+		if(!instances.containsKey(language.getName())) {
 			RuleManager nm = new RuleManager(language.getResourceFolder());
 			instances.put(language.getName(), nm);
 		}