diff --git a/dll/cpl/intl/intl.c b/dll/cpl/intl/intl.c
index bce915ce177..ec1720fbf2f 100644
--- a/dll/cpl/intl/intl.c
+++ b/dll/cpl/intl/intl.c
@@ -24,6 +24,7 @@
  */
 
 #include "intl.h"
+#include <setupapi_undoc.h> // For IsUserAdmin()
 
 #include <debug.h>
 
diff --git a/dll/cpl/sysdm/userprofile.c b/dll/cpl/sysdm/userprofile.c
index 25e0277b2de..c4d32d880ec 100644
--- a/dll/cpl/sysdm/userprofile.c
+++ b/dll/cpl/sysdm/userprofile.c
@@ -11,6 +11,7 @@
 #include "precomp.h"
 #include <sddl.h>
 #include <winnls.h>
+#include <setupapi_undoc.h> // For IsUserAdmin()
 
 #include <debug.h>
 
diff --git a/dll/shellext/netshell/connectmanager.cpp b/dll/shellext/netshell/connectmanager.cpp
index fd934b09b09..5a2789981f4 100644
--- a/dll/shellext/netshell/connectmanager.cpp
+++ b/dll/shellext/netshell/connectmanager.cpp
@@ -6,6 +6,7 @@
  */
 
 #include "precomp.h"
+#include <setupapi_undoc.h> // For IsUserAdmin()
 
 VOID NormalizeOperStatus(MIB_IFROW *IfEntry, NETCON_PROPERTIES * Props);