diff --git a/android/guava/src/com/google/common/collect/ImmutableMultimap.java b/android/guava/src/com/google/common/collect/ImmutableMultimap.java
index 2782a006c8fa..8f9b908b13b4 100644
--- a/android/guava/src/com/google/common/collect/ImmutableMultimap.java
+++ b/android/guava/src/com/google/common/collect/ImmutableMultimap.java
@@ -177,7 +177,8 @@ public Builder<K, V> put(K key, V value) {
       checkEntryNotNull(key, value);
       ImmutableCollection.Builder<V> valuesBuilder = ensureBuilderMapNonNull().get(key);
       if (valuesBuilder == null) {
-        builderMap.put(key, valuesBuilder = newValueCollectionBuilder());
+        valuesBuilder = newValueCollectionBuilder();
+        ensureBuilderMapNonNull().put(key, valuesBuilder);
       }
       valuesBuilder.add(value);
       return this;
@@ -224,7 +225,7 @@ public Builder<K, V> putAll(K key, Iterable<? extends V> values) {
       ImmutableCollection.Builder<V> valuesBuilder = ensureBuilderMapNonNull().get(key);
       if (valuesBuilder == null) {
         valuesBuilder = newValueCollectionBuilder();
-        builderMap.put(key, valuesBuilder);
+        ensureBuilderMapNonNull().put(key, valuesBuilder);
       }
       while (valuesItr.hasNext()) {
         V value = valuesItr.next();
diff --git a/guava/src/com/google/common/collect/ImmutableMultimap.java b/guava/src/com/google/common/collect/ImmutableMultimap.java
index 835c4dd9feaa..983974c0a80c 100644
--- a/guava/src/com/google/common/collect/ImmutableMultimap.java
+++ b/guava/src/com/google/common/collect/ImmutableMultimap.java
@@ -179,7 +179,8 @@ public Builder<K, V> put(K key, V value) {
       checkEntryNotNull(key, value);
       ImmutableCollection.Builder<V> valuesBuilder = ensureBuilderMapNonNull().get(key);
       if (valuesBuilder == null) {
-        builderMap.put(key, valuesBuilder = newValueCollectionBuilder());
+        valuesBuilder = newValueCollectionBuilder();
+        ensureBuilderMapNonNull().put(key, valuesBuilder);
       }
       valuesBuilder.add(value);
       return this;
@@ -226,7 +227,7 @@ public Builder<K, V> putAll(K key, Iterable<? extends V> values) {
       ImmutableCollection.Builder<V> valuesBuilder = ensureBuilderMapNonNull().get(key);
       if (valuesBuilder == null) {
         valuesBuilder = newValueCollectionBuilder();
-        builderMap.put(key, valuesBuilder);
+        ensureBuilderMapNonNull().put(key, valuesBuilder);
       }
       while (valuesItr.hasNext()) {
         V value = valuesItr.next();