Substring was not constructed correctly

Core/core/src/main/java/org/codeling/interprofile/internal/LanguageMatcher.java

@@ -138,7 +138,7 @@ public class LanguageMatcher {
 			public int compare(URI o1, URI o2) {
 				// Shortens from http://abc.de/.../1.0 to http://abc.de/...
 				String shortenedO1 = o1.toString().substring(0, o1.toString().lastIndexOf("/"));
-				String shortenedO2 = o2.toString().substring(0, o1.toString().lastIndexOf("/"));
+				String shortenedO2 = o2.toString().substring(0, o2.toString().lastIndexOf("/"));
 				
 				if(shortenedO1.contains(shortenedO2))
 					return 1;