diff --git a/bundles/org.eclipse.swt/Eclipse SWT Browser/win32/org/eclipse/swt/browser/Edge.java b/bundles/org.eclipse.swt/Eclipse SWT Browser/win32/org/eclipse/swt/browser/Edge.java
index 86e92717c3..41ad52df56 100644
--- a/bundles/org.eclipse.swt/Eclipse SWT Browser/win32/org/eclipse/swt/browser/Edge.java	
+++ b/bundles/org.eclipse.swt/Eclipse SWT Browser/win32/org/eclipse/swt/browser/Edge.java	
@@ -611,7 +611,7 @@ WebViewEnvironment createEnvironment() {
 	String browserArgs = System.getProperty(BROWSER_ARGS_PROP);
 	String language = System.getProperty(LANGUAGE_PROP);
 
-	boolean allowSSO = Boolean.getBoolean(ALLOW_SINGLE_SIGN_ON_USING_OS_PRIMARY_ACCOUNT_PROP);
+	boolean allowSSO = !"false".equalsIgnoreCase(System.getProperty(ALLOW_SINGLE_SIGN_ON_USING_OS_PRIMARY_ACCOUNT_PROP));
 
 	String dataDir = getDataDir(display);