diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/parser/GNUScannerExtensionConfiguration.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/parser/GNUScannerExtensionConfiguration.java
index 9a97e0da0e5..f1b0757f6ba 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/parser/GNUScannerExtensionConfiguration.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/parser/GNUScannerExtensionConfiguration.java
@@ -50,7 +50,7 @@ public abstract class GNUScannerExtensionConfiguration extends AbstractScannerEx
     	addPreprocessorKeyword(Keywords.cASSERT, IPreprocessorDirective.ppIgnore);
     	addPreprocessorKeyword(Keywords.cUNASSERT, IPreprocessorDirective.ppIgnore);
 
-		addKeyword(GCCKeywords.cp__ALIGNOF__, IGCCToken.t___alignof__ );
+		addKeyword(GCCKeywords.cp__ALIGNOF, IGCCToken.t___alignof__ );
 		addKeyword(GCCKeywords.cp__ALIGNOF__, IGCCToken.t___alignof__ );
 		addKeyword(GCCKeywords.cp__ASM, IToken.t_asm); 
 		addKeyword(GCCKeywords.cp__ASM__, IToken.t_asm);