diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/parser/cpp/ICPPParserExtensionConfiguration.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/parser/cpp/ICPPParserExtensionConfiguration.java
index 4081d9f6d10..192ddea3268 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/parser/cpp/ICPPParserExtensionConfiguration.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/parser/cpp/ICPPParserExtensionConfiguration.java
@@ -81,7 +81,9 @@ public interface ICPPParserExtensionConfiguration {
 	 * 
 	 * @return <code>true</code> if support for the extension should be
 	 *         enabled
+	 * @deprecated configure extra keywords, via {@link IScannerExtensionConfiguration#getAdditionalKeywords()}      
 	 */
+	@Deprecated
 	public boolean supportRestrictKeyword();
 
 	/**
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/GNUCPPSourceParser.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/GNUCPPSourceParser.java
index 170da467b89..fb3c595c953 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/GNUCPPSourceParser.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/GNUCPPSourceParser.java
@@ -1833,8 +1833,6 @@ public class GNUCPPSourceParser extends AbstractGNUSourceCodeParser {
 
     private final boolean supportComplex;
 
-    private final boolean supportRestrict;
-
     private final boolean supportLongLong;
 
 	private final IIndex index;
@@ -1873,7 +1871,6 @@ public class GNUCPPSourceParser extends AbstractGNUSourceCodeParser {
         allowCPPRestrict = config.allowRestrictPointerOperators();
         supportExtendedTemplateSyntax = config.supportExtendedTemplateSyntax();
         supportMinAndMaxOperators = config.supportMinAndMaxOperators();
-        supportRestrict = config.supportRestrictKeyword();
         supportComplex = config.supportComplexNumbers();
         supportLongLong = config.supportLongLongs();
         this.index= index;
@@ -2968,10 +2965,6 @@ public class GNUCPPSourceParser extends AbstractGNUSourceCodeParser {
                 last = consume();
                 break;
             case IToken.t_restrict:
-                if (!supportRestrict) {
-                    IToken la = LA(1);
-                    throwBacktrack(la.getOffset(), la.getEndOffset() - la.getOffset());
-                }
                 isRestrict = true;
                 last = consume();
                 break;