diff --git a/dlls/wer/main.c b/dlls/wer/main.c
index d015d27a7d3..740462f1886 100644
--- a/dlls/wer/main.c
+++ b/dlls/wer/main.c
@@ -26,6 +26,12 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(wer);
 
+HRESULT WINAPI WerAddExcludedApplication(PCWSTR exeName, BOOL allUsers)
+{
+    FIXME("(%s, %d) stub\n",debugstr_w(exeName), allUsers);
+    return E_NOTIMPL;
+}
+
 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
 {
     TRACE("(0x%p, %d, %p)\n", hinstDLL, fdwReason, lpvReserved);
diff --git a/dlls/wer/wer.spec b/dlls/wer/wer.spec
index b2edb3a15a3..d240a90ef50 100644
--- a/dlls/wer/wer.spec
+++ b/dlls/wer/wer.spec
@@ -61,7 +61,7 @@
 @ stub WerpShowUpsellUI
 @ stub WerpSubmitReportFromStore
 @ stub WerpSvcReportFromMachineQueue
-@ stub WerAddExcludedApplication
+@ stdcall WerAddExcludedApplication(wstr long)
 @ stub WerRemoveExcludedApplication
 @ stub WerReportAddDump
 @ stub WerReportAddFile