diff --git a/bundles/org.eclipse.swt/Eclipse SWT WebKit/gtk/org/eclipse/swt/internal/webkit/WebKitGTK.java b/bundles/org.eclipse.swt/Eclipse SWT WebKit/gtk/org/eclipse/swt/internal/webkit/WebKitGTK.java
index d2028ab370..d3db9f8770 100644
--- a/bundles/org.eclipse.swt/Eclipse SWT WebKit/gtk/org/eclipse/swt/internal/webkit/WebKitGTK.java	
+++ b/bundles/org.eclipse.swt/Eclipse SWT WebKit/gtk/org/eclipse/swt/internal/webkit/WebKitGTK.java	
@@ -76,14 +76,15 @@ public class WebKitGTK extends C {
 
 	public static final int WEBKIT_TLS_ERRORS_POLICY_IGNORE = 0;
 
-	public static final int G_TLS_CERTIFICATE_UNKNOWN_CA = 0;
-	public static final int G_TLS_CERTIFICATE_BAD_IDENTITY = 1;
-	public static final int G_TLS_CERTIFICATE_NOT_ACTIVATED = 2;
-	public static final int G_TLS_CERTIFICATE_EXPIRED = 3;
-	public static final int G_TLS_CERTIFICATE_REVOKED = 4;
-	public static final int G_TLS_CERTIFICATE_INSECURE = 5;
-	public static final int G_TLS_CERTIFICATE_GENERIC_ERROR = 6;
-	public static final int G_TLS_CERTIFICATE_VALIDATE_ALL = 7;
+	public static final int G_TLS_CERTIFICATE_NO_FLAGS = 0;
+	public static final int G_TLS_CERTIFICATE_UNKNOWN_CA = 1 << 0;
+	public static final int G_TLS_CERTIFICATE_BAD_IDENTITY = 1 << 1;
+	public static final int G_TLS_CERTIFICATE_NOT_ACTIVATED = 1 << 2;
+	public static final int G_TLS_CERTIFICATE_EXPIRED = 1 << 3;
+	public static final int G_TLS_CERTIFICATE_REVOKED = 1 << 4;
+	public static final int G_TLS_CERTIFICATE_INSECURE = 1 << 5;
+	public static final int G_TLS_CERTIFICATE_GENERIC_ERROR = 1 << 6;
+	public static final int G_TLS_CERTIFICATE_VALIDATE_ALL = 0x7f;
 
 	public static final int WEBKIT_WEBSITE_DATA_COOKIES = GTK.GTK4 ? 64 : 1 << 8;