diff --git a/winsup/w32api/ChangeLog b/winsup/w32api/ChangeLog
index 8e71fb154..2169c7296 100644
--- a/winsup/w32api/ChangeLog
+++ b/winsup/w32api/ChangeLog
@@ -1,3 +1,9 @@
+2008-01-30  Brandon Sneed  <nivenh@sourceware.org>
+
+	* include/windef.h (__in, __inout, __in_opt, __in_bcound, __in_ecount,
+	__out, __out_ecount_part, __struct_bcount, __field_ecount_opt,
+	__out_bcount_opt): Defined additional pseudo-modifiers.
+
 2008-01-29  Brandon Sneed  <nivenh@sourceware.org>
 	* include/ras.h (RAS_MaxDnsSuffix): corrected typo, was RAX_MaxDnsSuffix.
 	(RASENTRYA, RASENTRYW): Added members (dwfOptions2, dwfOptions3, szDnsSuffix, 
diff --git a/winsup/w32api/include/windef.h b/winsup/w32api/include/windef.h
index 3fd01c5bb..5dd04013c 100644
--- a/winsup/w32api/include/windef.h
+++ b/winsup/w32api/include/windef.h
@@ -62,6 +62,17 @@ extern "C" {
 #ifndef _NO_W32_PSEUDO_MODIFIERS
 #define IN
 #define OUT
+#define __in
+#define __inout
+#define __in_opt
+#define __in_bcount(x)
+#define __in_ecount(x)
+#define __out
+#define __out_ecount_part(x)
+#define __out_ecount_part(x,y)
+#define __struct_bcount(x)
+#define __field_ecount_opt(x)
+#define __out_bcount_opt(x)
 #ifndef OPTIONAL
 #define OPTIONAL
 #endif