diff --git a/src/org/chromium/support_lib_boundary/WebSettingsBoundaryInterface.java b/src/org/chromium/support_lib_boundary/WebSettingsBoundaryInterface.java
index 428a3cc..b198e33 100644
--- a/src/org/chromium/support_lib_boundary/WebSettingsBoundaryInterface.java
+++ b/src/org/chromium/support_lib_boundary/WebSettingsBoundaryInterface.java
@@ -20,4 +20,7 @@
 
     void setDisabledActionModeMenuItems(int menuItems);
     int getDisabledActionModeMenuItems();
+
+    void setShouldSuppressErrorPage(boolean suppressed);
+    boolean getShouldSuppressErrorPage();
 }
diff --git a/src/org/chromium/support_lib_boundary/util/Features.java b/src/org/chromium/support_lib_boundary/util/Features.java
index 8831362..c2faf74 100644
--- a/src/org/chromium/support_lib_boundary/util/Features.java
+++ b/src/org/chromium/support_lib_boundary/util/Features.java
@@ -132,6 +132,10 @@
     // ProxyController.clearProxyOverride
     public static final String PROXY_OVERRIDE = "PROXY_OVERRIDE:3";
 
+    // WebSettingsCompat.setShouldSuppressErrorPage
+    // WebSettingsCompat.getShouldSuppressErrorPage
+    public static final String SUPPRESS_ERROR_PAGE = "SUPPRESS_ERROR_PAGE";
+
     // WebViewCompat.getWebViewRenderer
     public static final String GET_WEB_VIEW_RENDERER = "GET_WEB_VIEW_RENDERER";