1 files changed, 2 insertions, 1 deletions

diff --git a/src/main/java/cuchaz/enigma/analysis/index/ReferenceIndex.java b/src/main/java/cuchaz/enigma/analysis/index/ReferenceIndex.java
index b26b08b0..b6797c21 100644
--- a/src/main/java/cuchaz/enigma/analysis/index/ReferenceIndex.java
+++ b/src/main/java/cuchaz/enigma/analysis/index/ReferenceIndex.java
@@ -97,7 +97,8 @@ public class ReferenceIndex implements JarIndexer {
         }
 
         private <K extends Entry<?>, V extends Entry<?>> Multimap<K, V> remapReferences(JarIndex index, Multimap<K, V> multimap) {
-                Multimap<K, V> resolved = HashMultimap.create(multimap.keySet().size(), multimap.size() / multimap.keySet().size());
+                final int keySetSize = multimap.keySet().size();
+                Multimap<K, V> resolved = HashMultimap.create(multimap.keySet().size(), keySetSize == 0 ? 0 : multimap.size() / keySetSize);
                 for (Map.Entry<K, V> entry : multimap.entries()) {
                         resolved.put(remap(index, entry.getKey()), remap(index, entry.getValue()));
                 }