diff --git a/google-cloud-clients/pom.xml b/google-cloud-clients/pom.xml
index 4663faa0c1a3..ba7a0816b9fa 100644
--- a/google-cloud-clients/pom.xml
+++ b/google-cloud-clients/pom.xml
@@ -159,6 +159,7 @@
     <api.common.java.version>1.7.0</api.common.java.version>
     <google.auth.version>0.12.0</google.auth.version>
     <grpc.version>1.17.1</grpc.version>
+    <!-- We are currently using the *-android version to support JDK7. -->
     <guava.version>26.0-android</guava.version>
     <http-client.version>1.27.0</http-client.version>
     <oauth-client.version>1.27.0</oauth-client.version>
diff --git a/google-cloud-testing/pom.xml b/google-cloud-testing/pom.xml
index d2359b2d230a..aacbfe4d915f 100644
--- a/google-cloud-testing/pom.xml
+++ b/google-cloud-testing/pom.xml
@@ -57,6 +57,7 @@
       <dependency>
         <groupId>com.google.guava</groupId>
         <artifactId>guava-testlib</artifactId>
+        <!-- We are currently using the *-android version to support JDK7. -->
         <version>26.0-android</version>
       </dependency>
       <dependency>
diff --git a/google-cloud-util/google-cloud-compat-checker/pom.xml b/google-cloud-util/google-cloud-compat-checker/pom.xml
index eb1f430d4f0c..ac4801b12ada 100644
--- a/google-cloud-util/google-cloud-compat-checker/pom.xml
+++ b/google-cloud-util/google-cloud-compat-checker/pom.xml
@@ -38,6 +38,7 @@
     <dependency>
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>
+      <!-- We are currently using the *-android version to support JDK7. -->
       <version>26.0-android</version>
     </dependency>
     <dependency>