diff --git a/reactos/dll/win32/uxtheme/msstyles.h b/reactos/dll/win32/uxtheme/msstyles.h
index 0eef06c6c1e..1d02725e185 100644
--- a/reactos/dll/win32/uxtheme/msstyles.h
+++ b/reactos/dll/win32/uxtheme/msstyles.h
@@ -82,7 +82,7 @@ typedef struct _THEME_FILE {
     PTHEME_IMAGE images;
 } THEME_FILE, *PTHEME_FILE;
 
-typedef void* PUXINI_FILE;
+typedef struct _UXINI_FILE *PUXINI_FILE;
 
 HRESULT MSSTYLES_OpenThemeFile(LPCWSTR lpThemeFile, LPCWSTR pszColorName, LPCWSTR pszSizeName, PTHEME_FILE *tf);
 void MSSTYLES_CloseThemeFile(PTHEME_FILE tf);