diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/index/IIndexManager.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/index/IIndexManager.java
index 0b61a345627..ef65bc7bfef 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/index/IIndexManager.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/index/IIndexManager.java
@@ -124,7 +124,7 @@ public interface IIndexManager extends IPDOMManager {
 	public static final int UPDATE_ALL= 0x1;
 
 	/**
-	 * Constant for requesting an update of translation units if theit timestamps have changed.
+	 * Constant for requesting an update of translation units if their timestamps have changed.
 	 */
 	public static final int UPDATE_CHECK_TIMESTAMPS= 0x2;