diff --git a/winsup/utils/cygpath.cc b/winsup/utils/cygpath.cc
index ccae98f77..bf77bb2a9 100644
--- a/winsup/utils/cygpath.cc
+++ b/winsup/utils/cygpath.cc
@@ -24,6 +24,7 @@ details. */
 #define _WIN32_WINNT 0x0a00
 #define WINVER 0x0a00
 #define NOCOMATTRIBUTE
+#define PMEM_EXTENDED_PARAMETER PVOID
 #include <windows.h>
 #include <userenv.h>
 #include <shlobj.h>
diff --git a/winsup/utils/ps.cc b/winsup/utils/ps.cc
index 731f72c18..4d7a56d3d 100644
--- a/winsup/utils/ps.cc
+++ b/winsup/utils/ps.cc
@@ -6,6 +6,7 @@ This software is a copyrighted work licensed under the terms of the
 Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
 details. */
 
+#define PMEM_EXTENDED_PARAMETER PVOID
 #include <errno.h>
 #include <stdio.h>
 #include <locale.h>