diff --git a/google-http-client/pom.xml b/google-http-client/pom.xml
index 4e23f0acd..b7afce45b 100644
--- a/google-http-client/pom.xml
+++ b/google-http-client/pom.xml
@@ -135,6 +135,10 @@
com.google.code.findbugs
jsr305
+
+ com.google.errorprone
+ error_prone_annotations
+
com.google.guava
guava
diff --git a/google-http-client/src/main/java/com/google/api/client/util/SslUtils.java b/google-http-client/src/main/java/com/google/api/client/util/SslUtils.java
index 5cb8f373c..a578c7383 100644
--- a/google-http-client/src/main/java/com/google/api/client/util/SslUtils.java
+++ b/google-http-client/src/main/java/com/google/api/client/util/SslUtils.java
@@ -14,6 +14,7 @@
package com.google.api.client.util;
+import com.google.errorprone.annotations.CanIgnoreReturnValue;
import java.security.GeneralSecurityException;
import java.security.KeyStore;
import java.security.NoSuchAlgorithmException;
@@ -101,6 +102,7 @@ public static KeyManagerFactory getPkixKeyManagerFactory() throws NoSuchAlgorith
* #getPkixTrustManagerFactory()})
* @since 1.14
*/
+ @CanIgnoreReturnValue
public static SSLContext initSslContext(
SSLContext sslContext, KeyStore trustStore, TrustManagerFactory trustManagerFactory)
throws GeneralSecurityException {