diff --git a/CHANGES b/CHANGES
index fc119fd13c..7906b30071 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,6 @@
+2690.	[bug]	 	win32: fix isc_thread_key_getspecific() prototype.
+			[RT #20315]
+
 2689.	[bug]		Correctly handle snprintf result. [RT #20306]
 
 2688.	[bug]		Use INTERFACE_F_POINTTOPOINT, not IFF_POINTOPOINT,
diff --git a/lib/isc/win32/include/isc/thread.h b/lib/isc/win32/include/isc/thread.h
index 78e663f457..a463686d51 100644
--- a/lib/isc/win32/include/isc/thread.h
+++ b/lib/isc/win32/include/isc/thread.h
@@ -15,7 +15,7 @@
  * PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: thread.h,v 1.22 2007/06/19 23:47:20 tbox Exp $ */
+/* $Id: thread.h,v 1.23 2009/09/25 05:48:17 marka Exp $ */
 
 #ifndef ISC_THREAD_H
 #define ISC_THREAD_H 1
@@ -90,7 +90,7 @@ int
 isc_thread_key_delete(isc_thread_key_t key);
 
 void *
-isc_thread_key_getspecific(isc_thread_key);
+isc_thread_key_getspecific(isc_thread_key_t);
 
 int
 isc_thread_key_setspecific(isc_thread_key_t key, void *value);