diff --git a/p2-maven-plugin/src/main/java/org/eclipse/tycho/p2maven/repository/DefaultRepositoryIdManager.java b/p2-maven-plugin/src/main/java/org/eclipse/tycho/p2maven/repository/DefaultRepositoryIdManager.java
index 88d23cb918..859d18884b 100644
--- a/p2-maven-plugin/src/main/java/org/eclipse/tycho/p2maven/repository/DefaultRepositoryIdManager.java
+++ b/p2-maven-plugin/src/main/java/org/eclipse/tycho/p2maven/repository/DefaultRepositoryIdManager.java
@@ -37,8 +37,9 @@ public class DefaultRepositoryIdManager implements IRepositoryIdManager {
 	private MavenRepositorySettings settings;
 	@Requirement
 	private Logger logger;
-
-    private Map<URI, String> knownMavenRepositoryIds = new ConcurrentHashMap<>();
+	// For some reason maven creates different instances of the component even if
+	// there should only be one...
+	private static final Map<URI, String> knownMavenRepositoryIds = new ConcurrentHashMap<>();
 
     @Override
     public void addMapping(String mavenRepositoryId, URI location) {