diff --git a/core/src/com/google/inject/internal/RealMapBinder.java b/core/src/com/google/inject/internal/RealMapBinder.java
index 63703ff8e4..a6c5361d5f 100644
--- a/core/src/com/google/inject/internal/RealMapBinder.java
+++ b/core/src/com/google/inject/internal/RealMapBinder.java
@@ -1178,7 +1178,7 @@ public Set<Dependency<?>> getDependencies() {
       protected void doInitialize(InjectorImpl injector, Errors errors) throws ErrorsException {
         @SuppressWarnings({"unchecked", "rawtypes"})
         PerKeyData<K, V>[] typedPerKeyData =
-            new PerKeyData[bindingSelection.getMapBindings().size()];
+            new PerKeyData[bindingSelection.getMultimapBindings().size()];
         perKeyDatas = typedPerKeyData;
         ImmutableSet.Builder<Dependency<?>> dependenciesBuilder = ImmutableSet.builder();
         List<Dependency<?>> dependenciesForKey = Lists.newArrayList();