diff --git a/dlls/wininet/ftp.c b/dlls/wininet/ftp.c
index 1b672118639..db64a177484 100644
--- a/dlls/wininet/ftp.c
+++ b/dlls/wininet/ftp.c
@@ -1291,6 +1291,12 @@ static DWORD FTPFILE_QueryDataAvailable(object_header_t *hdr, DWORD *available,
     return ERROR_SUCCESS;
 }
 
+static DWORD FTPFILE_LockRequestFile(object_header_t *hdr, req_file_t **ret)
+{
+    ftp_file_t *file = (ftp_file_t*)hdr;
+    FIXME("%p\n", file);
+    return ERROR_NOT_SUPPORTED;
+}
 
 static const object_vtbl_t FTPFILEVtbl = {
     FTPFILE_Destroy,
@@ -1301,7 +1307,8 @@ static const object_vtbl_t FTPFILEVtbl = {
     FTPFILE_ReadFileEx,
     FTPFILE_WriteFile,
     FTPFILE_QueryDataAvailable,
-    NULL
+    NULL,
+    FTPFILE_LockRequestFile
 };
 
 /***********************************************************************
diff --git a/dlls/wininet/http.c b/dlls/wininet/http.c
index d2bd2d47302..26156ce97dd 100644
--- a/dlls/wininet/http.c
+++ b/dlls/wininet/http.c
@@ -3252,6 +3252,13 @@ done:
     return ERROR_SUCCESS;
 }
 
+static DWORD HTTPREQ_LockRequestFile(object_header_t *hdr, req_file_t **ret)
+{
+    http_request_t *req = (http_request_t*)hdr;
+    FIXME("(%p)\n", req);
+    return ERROR_NOT_SUPPORTED;
+}
+
 static const object_vtbl_t HTTPREQVtbl = {
     HTTPREQ_Destroy,
     HTTPREQ_CloseConnection,
@@ -3261,7 +3268,8 @@ static const object_vtbl_t HTTPREQVtbl = {
     HTTPREQ_ReadFileEx,
     HTTPREQ_WriteFile,
     HTTPREQ_QueryDataAvailable,
-    NULL
+    NULL,
+    HTTPREQ_LockRequestFile
 };
 
 /***********************************************************************
diff --git a/dlls/wininet/internet.c b/dlls/wininet/internet.c
index ace1bfacef2..f1ea8be9064 100644
--- a/dlls/wininet/internet.c
+++ b/dlls/wininet/internet.c
@@ -3935,11 +3935,33 @@ void req_file_release(req_file_t *req_file)
 /***********************************************************************
  *      InternetLockRequestFile (WININET.@)
  */
-BOOL WINAPI InternetLockRequestFile( HINTERNET hInternet, HANDLE
-*lphLockReqHandle)
+BOOL WINAPI InternetLockRequestFile(HINTERNET hInternet, HANDLE *lphLockReqHandle)
 {
-    FIXME("STUB\n");
-    return FALSE;
+    req_file_t *req_file = NULL;
+    object_header_t *hdr;
+    DWORD res;
+
+    TRACE("(%p %p)\n", hInternet, lphLockReqHandle);
+
+    hdr = get_handle_object(hInternet);
+    if (!hdr) {
+        SetLastError(ERROR_INVALID_HANDLE);
+        return FALSE;
+    }
+
+    if(hdr->vtbl->LockRequestFile) {
+        res = hdr->vtbl->LockRequestFile(hdr, &req_file);
+    }else {
+        WARN("wrong handle\n");
+        res = ERROR_INTERNET_INCORRECT_HANDLE_TYPE;
+    }
+
+    WININET_Release(hdr);
+
+    *lphLockReqHandle = req_file;
+    if(res != ERROR_SUCCESS)
+        SetLastError(res);
+    return res == ERROR_SUCCESS;
 }
 
 BOOL WINAPI InternetUnlockRequestFile( HANDLE hLockHandle)
diff --git a/dlls/wininet/internet.h b/dlls/wininet/internet.h
index 8cde45ef188..2195897d4ba 100644
--- a/dlls/wininet/internet.h
+++ b/dlls/wininet/internet.h
@@ -266,6 +266,7 @@ typedef struct {
     DWORD (*WriteFile)(object_header_t*,const void*,DWORD,DWORD*);
     DWORD (*QueryDataAvailable)(object_header_t*,DWORD*,DWORD,DWORD_PTR);
     DWORD (*FindNextFileW)(object_header_t*,void*);
+    DWORD (*LockRequestFile)(object_header_t*,req_file_t**);
 } object_vtbl_t;
 
 #define INTERNET_HANDLE_IN_USE 1