diff --git a/configure b/configure
index a6934eafd34..8c0e9f5a829 100755
--- a/configure
+++ b/configure
@@ -1010,6 +1010,7 @@ enable_api_ms_win_eventing_controller_l1_1_0
 enable_api_ms_win_eventing_provider_l1_1_0
 enable_api_ms_win_eventlog_legacy_l1_1_0
 enable_api_ms_win_ntuser_dc_access_l1_1_0
+enable_api_ms_win_rtcore_ntuser_private_l1_1_0
 enable_api_ms_win_security_audit_l1_1_1
 enable_api_ms_win_security_base_l1_1_0
 enable_api_ms_win_security_base_l1_2_0
@@ -17705,6 +17706,7 @@ wine_fn_config_dll api-ms-win-eventing-controller-l1-1-0 enable_api_ms_win_event
 wine_fn_config_dll api-ms-win-eventing-provider-l1-1-0 enable_api_ms_win_eventing_provider_l1_1_0
 wine_fn_config_dll api-ms-win-eventlog-legacy-l1-1-0 enable_api_ms_win_eventlog_legacy_l1_1_0
 wine_fn_config_dll api-ms-win-ntuser-dc-access-l1-1-0 enable_api_ms_win_ntuser_dc_access_l1_1_0
+wine_fn_config_dll api-ms-win-rtcore-ntuser-private-l1-1-0 enable_api_ms_win_rtcore_ntuser_private_l1_1_0
 wine_fn_config_dll api-ms-win-security-audit-l1-1-1 enable_api_ms_win_security_audit_l1_1_1
 wine_fn_config_dll api-ms-win-security-base-l1-1-0 enable_api_ms_win_security_base_l1_1_0
 wine_fn_config_dll api-ms-win-security-base-l1-2-0 enable_api_ms_win_security_base_l1_2_0
diff --git a/configure.ac b/configure.ac
index 84316f99a2b..94b494b3d89 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2787,6 +2787,7 @@ WINE_CONFIG_DLL(api-ms-win-eventing-controller-l1-1-0)
 WINE_CONFIG_DLL(api-ms-win-eventing-provider-l1-1-0)
 WINE_CONFIG_DLL(api-ms-win-eventlog-legacy-l1-1-0)
 WINE_CONFIG_DLL(api-ms-win-ntuser-dc-access-l1-1-0)
+WINE_CONFIG_DLL(api-ms-win-rtcore-ntuser-private-l1-1-0)
 WINE_CONFIG_DLL(api-ms-win-security-audit-l1-1-1)
 WINE_CONFIG_DLL(api-ms-win-security-base-l1-1-0)
 WINE_CONFIG_DLL(api-ms-win-security-base-l1-2-0)
diff --git a/dlls/api-ms-win-rtcore-ntuser-private-l1-1-0/Makefile.in b/dlls/api-ms-win-rtcore-ntuser-private-l1-1-0/Makefile.in
new file mode 100644
index 00000000000..a831ede4d05
--- /dev/null
+++ b/dlls/api-ms-win-rtcore-ntuser-private-l1-1-0/Makefile.in
@@ -0,0 +1 @@
+MODULE    = api-ms-win-rtcore-ntuser-private-l1-1-0.dll
diff --git a/dlls/api-ms-win-rtcore-ntuser-private-l1-1-0/api-ms-win-rtcore-ntuser-private-l1-1-0.spec b/dlls/api-ms-win-rtcore-ntuser-private-l1-1-0/api-ms-win-rtcore-ntuser-private-l1-1-0.spec
new file mode 100644
index 00000000000..1520a5b9e5c
--- /dev/null
+++ b/dlls/api-ms-win-rtcore-ntuser-private-l1-1-0/api-ms-win-rtcore-ntuser-private-l1-1-0.spec
@@ -0,0 +1,9 @@
+@ stub CreateDCompositionHwndTarget
+@ stub CreateWindowInBand
+@ stub DestroyDCompositionHwndTarget
+@ stdcall GetTaskmanWindow() user32.GetTaskmanWindow
+@ stub GetWindowBand
+@ stub IsWindowInDestroy
+@ stub RegisterSessionPort
+@ stdcall SetTaskmanWindow(long) user32.SetTaskmanWindow
+@ stub UnregisterSessionPort
diff --git a/tools/make_specfiles b/tools/make_specfiles
index 8e115296312..8ca5437d08a 100755
--- a/tools/make_specfiles
+++ b/tools/make_specfiles
@@ -266,6 +266,7 @@ my @dll_groups =
   "api-ms-win-core-string-l2-1-0",
   "api-ms-win-downlevel-user32-l1-1-0",
   "api-ms-win-ntuser-dc-access-l1-1-0",
+  "api-ms-win-rtcore-ntuser-private-l1-1-0",
   "ext-ms-win-ntuser-message-l1-1-1",
   "ext-ms-win-ntuser-uicontext-ext-l1-1-0",
   "ext-ms-win-rtcore-ntuser-dpi-l1-1-0",