diff --git a/dlls/wer/main.c b/dlls/wer/main.c
index 0f5ad54af99..a01479cf9be 100644
--- a/dlls/wer/main.c
+++ b/dlls/wer/main.c
@@ -198,6 +198,29 @@ HRESULT WINAPI WerReportAddDump(HREPORT hReportHandle, HANDLE hProcess, HANDLE h
     return E_NOTIMPL;
 }
 
+/***********************************************************************
+ * WerReportAddFile (wer.@)
+ *
+ * Add File to a error report handle.
+ *
+ * PARAMS
+ *  hreport [i] error reporting handle to add the file
+ *  path    [i] path to the file to add
+ *  type    [i] type of the file to add
+ *  flags   [i] flags for the file
+ *
+ * RETURNS
+ *  Success: S_OK
+ *  Failure: A HRESULT error code
+ *
+ */
+HRESULT WINAPI WerReportAddFile(HREPORT hreport, PCWSTR path, WER_FILE_TYPE type, DWORD flags)
+{
+    FIXME("(%p, %s, %d, 0x%x) :stub\n", hreport, debugstr_w(path), type, flags);
+
+    return S_OK;
+}
+
 /***********************************************************************
  * WerReportCloseHandle (wer.@)
  *
diff --git a/dlls/wer/wer.spec b/dlls/wer/wer.spec
index fe9fad7ed62..e4cef3b32c9 100644
--- a/dlls/wer/wer.spec
+++ b/dlls/wer/wer.spec
@@ -64,7 +64,7 @@
 @ stdcall WerAddExcludedApplication(wstr long)
 @ stdcall WerRemoveExcludedApplication(wstr long)
 @ stdcall WerReportAddDump(ptr ptr ptr long ptr ptr long)
-@ stub WerReportAddFile
+@ stdcall WerReportAddFile(ptr wstr long long)
 @ stdcall WerReportCloseHandle(ptr)
 @ stdcall WerReportCreate(wstr long ptr ptr)
 @ stdcall WerReportSetParameter(ptr long wstr wstr)
diff --git a/include/werapi.h b/include/werapi.h
index c709dad09eb..6c3bb240115 100644
--- a/include/werapi.h
+++ b/include/werapi.h
@@ -70,6 +70,16 @@ typedef enum _WER_CONSENT
     WerConsentMax
 } WER_CONSENT;
 
+typedef enum _WER_FILE_TYPE
+{
+    WerFileTypeMicrodump = 1,
+    WerFileTypeMinidump,
+    WerFileTypeHeapdump,
+    WerFileTypeUserDocument,
+    WerFileTypeOther,
+    WerFileTypeMax
+} WER_FILE_TYPE;
+
 typedef enum _WER_REGISTER_FILE_TYPE
 {
     WerRegFileTypeUserDocument = 1,
@@ -166,6 +176,7 @@ typedef struct _WER_EXCEPTION_INFORMATION
 HRESULT WINAPI WerAddExcludedApplication(PCWSTR, BOOL);
 HRESULT WINAPI WerRegisterFile(PCWSTR file, WER_REGISTER_FILE_TYPE regfiletype, DWORD flags);
 HRESULT WINAPI WerRemoveExcludedApplication(PCWSTR, BOOL);
+HRESULT WINAPI WerReportAddFile(HREPORT, PCWSTR, WER_FILE_TYPE, DWORD);
 HRESULT WINAPI WerReportCloseHandle(HREPORT);
 HRESULT WINAPI WerReportCreate(PCWSTR, WER_REPORT_TYPE, PWER_REPORT_INFORMATION, HREPORT*);
 HRESULT WINAPI WerReportSetParameter(HREPORT, DWORD, PCWSTR, PCWSTR);