diff --git a/build/org.eclipse.cdt.autotools.core/src/org/eclipse/cdt/autotools/core/AutotoolsOptionConstants.java b/build/org.eclipse.cdt.autotools.core/src/org/eclipse/cdt/autotools/core/AutotoolsOptionConstants.java
index 2068ad00fac..171bdb0c0ae 100644
--- a/build/org.eclipse.cdt.autotools.core/src/org/eclipse/cdt/autotools/core/AutotoolsOptionConstants.java
+++ b/build/org.eclipse.cdt.autotools.core/src/org/eclipse/cdt/autotools/core/AutotoolsOptionConstants.java
@@ -62,6 +62,9 @@ public class AutotoolsOptionConstants {
 	 * @since 2.0
 	 */
 	public static final String CATEGORY_ENVVAR = "cat_envvar"; // $NON-NLS-1$
+	/**
+	 * @since 2.0
+	 */
 	public final static String OPT_ENVVAR = "env_vars"; // $NON-NLS-1$
 
 }