diff --git a/android/guava/src/com/google/common/base/Suppliers.java b/android/guava/src/com/google/common/base/Suppliers.java
index 32b9fec0a92f..e99f73ec450a 100644
--- a/android/guava/src/com/google/common/base/Suppliers.java
+++ b/android/guava/src/com/google/common/base/Suppliers.java
@@ -174,7 +174,7 @@ static class NonSerializableMemoizingSupplier<T extends @Nullable Object> implem
     private final Object lock = new Object();
 
     @SuppressWarnings("UnnecessaryLambda") // Must be a fixed singleton object
-    private static final Supplier<Void> SUCCESSFULLY_COMPUTED =
+    private static final Supplier<@Nullable Void> SUCCESSFULLY_COMPUTED =
         () -> {
           throw new IllegalStateException(); // Should never get called.
         };
diff --git a/guava/src/com/google/common/base/Suppliers.java b/guava/src/com/google/common/base/Suppliers.java
index 32b9fec0a92f..e99f73ec450a 100644
--- a/guava/src/com/google/common/base/Suppliers.java
+++ b/guava/src/com/google/common/base/Suppliers.java
@@ -174,7 +174,7 @@ static class NonSerializableMemoizingSupplier<T extends @Nullable Object> implem
     private final Object lock = new Object();
 
     @SuppressWarnings("UnnecessaryLambda") // Must be a fixed singleton object
-    private static final Supplier<Void> SUCCESSFULLY_COMPUTED =
+    private static final Supplier<@Nullable Void> SUCCESSFULLY_COMPUTED =
         () -> {
           throw new IllegalStateException(); // Should never get called.
         };