diff --git a/bundles/org.eclipse.swt/Eclipse SWT/carbon/org/eclipse/swt/graphics/GC.java b/bundles/org.eclipse.swt/Eclipse SWT/carbon/org/eclipse/swt/graphics/GC.java
index 7c95fc4..06ee27b 100644
--- a/bundles/org.eclipse.swt/Eclipse SWT/carbon/org/eclipse/swt/graphics/GC.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT/carbon/org/eclipse/swt/graphics/GC.java
@@ -105,6 +105,7 @@
  * </ul>
  * @exception SWTError <ul>
  *    <li>ERROR_NO_HANDLES if a handle could not be obtained for GC creation</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li>
  * </ul>
  */
 public GC(Drawable drawable) {
@@ -133,6 +134,7 @@
  * </ul>
  * @exception SWTError <ul>
  *    <li>ERROR_NO_HANDLES if a handle could not be obtained for GC creation</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li>
  * </ul>
  *  
  * @since 2.1.2
@@ -674,6 +676,10 @@
  * Disposes of the operating system resources associated with
  * the graphics context. Applications must dispose of all GCs
  * which they allocate.
+ * 
+ * @exception SWTError <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li>
+ * </ul>
  */
 public void dispose() {
 	if (handle == 0) return;
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/graphics/GC.java b/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/graphics/GC.java
index 36771fb..0dcd0c5 100644
--- a/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/graphics/GC.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/graphics/GC.java
@@ -105,6 +105,7 @@
  * </ul>
  * @exception SWTError <ul>
  *    <li>ERROR_NO_HANDLES if a handle could not be obtained for GC creation</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li>
  * </ul>
  */
 public GC(Drawable drawable) {
@@ -133,6 +134,7 @@
  * </ul>
  * @exception SWTError <ul>
  *    <li>ERROR_NO_HANDLES if a handle could not be obtained for GC creation</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li>
  * </ul>
  *  
  * @since 2.1.2
@@ -521,6 +523,10 @@
  * Disposes of the operating system resources associated with
  * the graphics context. Applications must dispose of all GCs
  * which they allocate.
+ * 
+ * @exception SWTError <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li>
+ * </ul>
  */
 public void dispose() {
 	if (handle == 0) return;
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/graphics/GC.java b/bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/graphics/GC.java
index 18af1de..8dde92c 100755
--- a/bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/graphics/GC.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/graphics/GC.java
@@ -106,6 +106,7 @@
  * </ul>
  * @exception SWTError <ul>
  *    <li>ERROR_NO_HANDLES if a handle could not be obtained for GC creation</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li>
  * </ul>
  */
 public GC(Drawable drawable) {
@@ -133,6 +134,7 @@
  * </ul>
  * @exception SWTError <ul>
  *    <li>ERROR_NO_HANDLES if a handle could not be obtained for GC creation</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li>
  * </ul>
  *  
  * @since 2.1.2
@@ -460,6 +462,10 @@
  * Disposes of the operating system resources associated with
  * the graphics context. Applications must dispose of all GCs
  * which they allocate.
+ * 
+ * @exception SWTError <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li>
+ * </ul>
  */
 public void dispose () {
 	if (handle == 0) return;
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/photon/org/eclipse/swt/graphics/GC.java b/bundles/org.eclipse.swt/Eclipse SWT/photon/org/eclipse/swt/graphics/GC.java
index f7a01f5..f8d6d9d 100755
--- a/bundles/org.eclipse.swt/Eclipse SWT/photon/org/eclipse/swt/graphics/GC.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT/photon/org/eclipse/swt/graphics/GC.java
@@ -106,6 +106,7 @@
  * </ul>
  * @exception SWTError <ul>
  *    <li>ERROR_NO_HANDLES if a handle could not be obtained for GC creation</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li>
  * </ul>
  */
 public GC(Drawable drawable) {
@@ -134,6 +135,7 @@
  * </ul>
  * @exception SWTError <ul>
  *    <li>ERROR_NO_HANDLES if a handle could not be obtained for GC creation</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li>
  * </ul>
  *  
  * @since 2.1.2
@@ -389,6 +391,10 @@
  * Disposes of the operating system resources associated with
  * the graphics context. Applications must dispose of all GCs
  * which they allocate.
+ * 
+ * @exception SWTError <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li>
+ * </ul>
  */
 public void dispose() {
 	int flags = OS.PtEnter(0);
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/wpf/org/eclipse/swt/graphics/GC.java b/bundles/org.eclipse.swt/Eclipse SWT/wpf/org/eclipse/swt/graphics/GC.java
index ac26c6b..9618623 100644
--- a/bundles/org.eclipse.swt/Eclipse SWT/wpf/org/eclipse/swt/graphics/GC.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT/wpf/org/eclipse/swt/graphics/GC.java
@@ -106,6 +106,7 @@
  * </ul>
  * @exception SWTError <ul>
  *    <li>ERROR_NO_HANDLES if a handle could not be obtained for GC creation</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li>
  * </ul>
  */
 public GC(Drawable drawable) {
@@ -134,6 +135,7 @@
  * </ul>
  * @exception SWTError <ul>
  *    <li>ERROR_NO_HANDLES if a handle could not be obtained for GC creation</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li>
  * </ul>
  *  
  * @since 2.1.2
@@ -380,6 +382,10 @@
  * Disposes of the operating system resources associated with
  * the graphics context. Applications must dispose of all GCs
  * which they allocate.
+ * 
+ * @exception SWTError <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li>
+ * </ul>
  */
 public void dispose() {
 	if (handle == 0) return;