diff --git a/mobile/library/java/org/chromium/net/impl/NativeCronvoyEngineBuilderImpl.java b/mobile/library/java/org/chromium/net/impl/NativeCronvoyEngineBuilderImpl.java
index b72441e6be8d..243c64df08d2 100644
--- a/mobile/library/java/org/chromium/net/impl/NativeCronvoyEngineBuilderImpl.java
+++ b/mobile/library/java/org/chromium/net/impl/NativeCronvoyEngineBuilderImpl.java
@@ -53,7 +53,7 @@ public class NativeCronvoyEngineBuilderImpl extends CronvoyEngineBuilderImpl {
   private final int mH2ConnectionKeepaliveIdleIntervalMilliseconds = 1;
   private final int mH2ConnectionKeepaliveTimeoutSeconds = 10;
   private final int mMaxConnectionsPerHost = 7;
-  private final int mStreamIdleTimeoutSeconds = 15;
+  private int mStreamIdleTimeoutSeconds = 15;
   private final int mPerTryIdleTimeoutSeconds = 15;
   private final String mAppVersion = "unspecified";
   private final String mAppId = "unspecified";
@@ -111,6 +111,19 @@ public NativeCronvoyEngineBuilderImpl setMinDnsRefreshSeconds(int minRefreshSeco
     return this;
   }
 
+  /**
+   * Set the stream idle timeout, in seconds, which is defined as the period in which there are no
+   * active requests. When the idle timeout is reached, the connection is closed.
+   *
+   * The default is 15s.
+   *
+   * @param timeout The stream idle timeout, in seconds.
+   */
+  public NativeCronvoyEngineBuilderImpl setStreamIdleTimeoutSeconds(int timeout) {
+    mStreamIdleTimeoutSeconds = timeout;
+    return this;
+  }
+
   /**
    * Sets the boolean value for the reloadable runtime feature flag value. For example, to set the
    * Envoy runtime flag `envoy.reloadable_features.http_allow_partial_urls_in_referer` to true,