diff --git a/dlls/urlmon/umon.c b/dlls/urlmon/umon.c
index 6bc28ac2591..4ec9490760c 100644
--- a/dlls/urlmon/umon.c
+++ b/dlls/urlmon/umon.c
@@ -1608,6 +1608,51 @@ HRESULT WINAPI URLDownloadToFileW(LPUNKNOWN pCaller,
     return S_OK;
 }
 
+/***********************************************************************
+ *           URLDownloadToCacheFileA (URLMON.@)
+ */
+HRESULT WINAPI URLDownloadToCacheFileA(LPUNKNOWN lpUnkCaller, LPCSTR szURL, LPSTR szFileName,
+        DWORD dwBufLength, DWORD dwReserved, LPBINDSTATUSCALLBACK pBSC)
+{
+    LPWSTR url = NULL, file_name = NULL;
+    int len;
+    HRESULT hres;
+
+    TRACE("(%p %s %p %ld %ld %p)\n", lpUnkCaller, debugstr_a(szURL), szFileName,
+            dwBufLength, dwReserved, pBSC);
+
+    if(szURL) {
+        len = MultiByteToWideChar(CP_ACP, 0, szURL, -1, NULL, 0);
+        url = HeapAlloc(GetProcessHeap(), 0, len*sizeof(WCHAR));
+        MultiByteToWideChar(CP_ACP, 0, szURL, -1, url, -1);
+    }
+
+    if(szFileName)
+        file_name = HeapAlloc(GetProcessHeap(), 0, dwBufLength*sizeof(WCHAR));
+
+    hres = URLDownloadToCacheFileW(lpUnkCaller, url, file_name, dwBufLength*sizeof(WCHAR),
+            dwReserved, pBSC);
+
+    if(SUCCEEDED(hres) && file_name)
+        WideCharToMultiByte(CP_ACP, 0, file_name, -1, szFileName, dwBufLength, NULL, NULL);
+
+    HeapFree(GetProcessHeap(), 0, url);
+    HeapFree(GetProcessHeap(), 0, file_name);
+
+    return hres;
+}
+
+/***********************************************************************
+ *           URLDownloadToCacheFileW (URLMON.@)
+ */
+HRESULT WINAPI URLDownloadToCacheFileW(LPUNKNOWN lpUnkCaller, LPCWSTR szURL, LPWSTR szFileName,
+                DWORD dwBufLength, DWORD dwReserved, LPBINDSTATUSCALLBACK pBSC)
+{
+    FIXME("(%p %s %p %ld %ld %p)\n", lpUnkCaller, debugstr_w(szURL), szFileName,
+            dwBufLength, dwReserved, pBSC);
+    return E_NOTIMPL;
+}
+
 /***********************************************************************
  *           HlinkSimpleNavigateToString (URLMON.@)
  */
diff --git a/dlls/urlmon/urlmon.spec b/dlls/urlmon/urlmon.spec
index 143c180114b..3399edbbd2f 100644
--- a/dlls/urlmon/urlmon.spec
+++ b/dlls/urlmon/urlmon.spec
@@ -64,8 +64,8 @@
 @ stdcall RevokeFormatEnumerator(ptr ptr)
 @ stub SetSoftwareUpdateAdvertisementState
 @ stub URLDownloadA
-@ stub URLDownloadToCacheFileA
-@ stub URLDownloadToCacheFileW
+@ stdcall URLDownloadToCacheFileA(ptr str str long ptr)
+@ stdcall URLDownloadToCacheFileW(ptr wstr wstr long ptr)
 @ stdcall URLDownloadToFileA(ptr str str long ptr)
 @ stdcall URLDownloadToFileW(ptr wstr wstr long ptr)
 @ stub URLDownloadW
diff --git a/include/urlmon.idl b/include/urlmon.idl
index a2d4ead4399..1fa8b4fa3d8 100644
--- a/include/urlmon.idl
+++ b/include/urlmon.idl
@@ -1166,8 +1166,10 @@ cpp_quote("HRESULT WINAPI CoGetClassObjectFromURL(REFCLSID, LPCWSTR, DWORD, DWOR
 cpp_quote("HRESULT WINAPI CreateURLMoniker(IMoniker *pmkContext, LPCWSTR szURL, IMoniker **ppmk);")
 cpp_quote("HRESULT WINAPI RegisterBindStatusCallback(IBindCtx *pbc, IBindStatusCallback *pbsc, IBindStatusCallback **ppbsc, DWORD dwReserved);")
 cpp_quote("HRESULT WINAPI CompareSecurityIds(BYTE*,DWORD,BYTE*,DWORD,DWORD);")
-cpp_quote("HRESULT WINAPI URLDownloadToFileA(LPUNKNOWN pCaller, LPCSTR szURL,  LPCSTR  szFileName, DWORD dwReserved, LPBINDSTATUSCALLBACK lpfnCB);")
-cpp_quote("HRESULT WINAPI URLDownloadToFileW(LPUNKNOWN pCaller, LPCWSTR szURL, LPCWSTR szFileName, DWORD dwReserved, LPBINDSTATUSCALLBACK lpfnCB);")
+cpp_quote("HRESULT WINAPI URLDownloadToFileA(LPUNKNOWN,LPCSTR,LPCSTR,DWORD,LPBINDSTATUSCALLBACK);")
+cpp_quote("HRESULT WINAPI URLDownloadToFileW(LPUNKNOWN,LPCWSTR,LPCWSTR,DWORD,LPBINDSTATUSCALLBACK);")
+cpp_quote("HRESULT WINAPI URLDownloadToCacheFileA(LPUNKNOWN,LPCSTR,LPSTR,DWORD,DWORD,LPBINDSTATUSCALLBACK);")
+cpp_quote("HRESULT WINAPI URLDownloadToCacheFileW(LPUNKNOWN,LPCWSTR,LPWSTR,DWORD,DWORD,LPBINDSTATUSCALLBACK);")
 cpp_quote("HRESULT WINAPI CoInternetGetSession(DWORD,IInternetSession**,DWORD);")
 cpp_quote("HRESULT WINAPI MkParseDisplayNameEx(IBindCtx*,LPCWSTR,ULONG*,IMoniker**);")
 cpp_quote("HRESULT WINAPI IsAsyncMoniker(IMoniker* pmk);")