1 files changed, 1 insertions, 2 deletions

diff --git a/src/main/java/cuchaz/enigma/analysis/JarIndex.java b/src/main/java/cuchaz/enigma/analysis/JarIndex.java
index 2f3501d..87e6e88 100644
--- a/src/main/java/cuchaz/enigma/analysis/JarIndex.java
+++ b/src/main/java/cuchaz/enigma/analysis/JarIndex.java
@@ -385,8 +385,7 @@ public class JarIndex {
 
         public Set<ClassEntry> getInterfaces(String className) {
                 ClassEntry classEntry = entryPool.getClass(className);
-                Set<ClassEntry> interfaces = new HashSet<>();
-                interfaces.addAll(this.translationIndex.getInterfaces(classEntry));
+                Set<ClassEntry> interfaces = new HashSet<>(this.translationIndex.getInterfaces(classEntry));
                 for (ClassEntry ancestor : this.translationIndex.getAncestry(classEntry)) {
                         interfaces.addAll(this.translationIndex.getInterfaces(ancestor));
                 }