diff --git a/winsup/w32api/lib/uxtheme.def b/winsup/w32api/lib/uxtheme.def
new file mode 100644
index 000000000..3a83beb17
--- /dev/null
+++ b/winsup/w32api/lib/uxtheme.def
@@ -0,0 +1,50 @@
+LIBRARY UxTheme.dll
+EXPORTS
+CloseThemeData@4
+DrawThemeBackground@24
+DrawThemeBackgroundEx@24
+DrawThemeEdge@32
+DrawThemeIcon@28
+DrawThemeParentBackground@12
+DrawThemeText@36
+EnableThemeDialogTexture@8
+EnableTheming@4
+GetCurrentThemeName@24
+GetThemeAppProperties@0
+GetThemeBackgroundContentRect@24
+GetThemeBackgroundExtent@24
+GetThemeBackgroundRegion@24
+GetThemeBool@20
+GetThemeColor@20
+GetThemeDocumentationProperty@16
+GetThemeEnumValue@20
+GetThemeFilename@24
+GetThemeFont@24
+GetThemeInt@20
+GetThemeIntList@20
+GetThemeMargins@28
+GetThemeMetric@24
+GetThemePartSize@28
+GetThemePosition@20
+GetThemePropertyOrigin@20
+GetThemeRect@20
+GetThemeString@24
+GetThemeSysBool@8
+GetThemeSysColor@8
+GetThemeSysColorBrush@8
+GetThemeSysFont@12
+GetThemeSysInt@12
+GetThemeSysSize@8
+GetThemeSysString@16
+GetThemeTextExtent@36
+GetThemeTextMetrics@20
+GetWindowTheme@4
+HitTestThemeBackground@40
+IsAppThemed@0
+IsThemeActive@0
+IsThemeBackgroundPartiallyTransparent@12
+IsThemeDialogTextureEnabled@4
+IsThemePartDefined@12
+OpenThemeData@8
+SetThemeAppProperties@4
+SetWindowTheme@12