diff --git a/dlls/tapi32/line.c b/dlls/tapi32/line.c
index cbb5f981570..756adf6467c 100644
--- a/dlls/tapi32/line.c
+++ b/dlls/tapi32/line.c
@@ -1033,6 +1033,16 @@ LONG WINAPI lineInitializeExA(LPHLINEAPP lphLineApp, HINSTANCE hInstance, LINECA
     return 0;
 }
 
+/***********************************************************************
+ *              lineInitializeExW (TAPI32.@)
+ */
+LONG WINAPI lineInitializeExW(LPHLINEAPP lphLineApp, HINSTANCE hInstance, LINECALLBACK lpfnCallback, LPCWSTR lpszFriendlyAppName, LPDWORD lpdwNumDevs, LPDWORD lpdwAPIVersion, LPLINEINITIALIZEEXPARAMS lpLineInitializeExParams)
+{
+    FIXME("(%p, %p, %p, %s, %p, %p, %p): stub.\n", lphLineApp, hInstance,
+          lpfnCallback, debugstr_w(lpszFriendlyAppName), lpdwNumDevs, lpdwAPIVersion, lpLineInitializeExParams);
+    return 0;
+}
+
 /***********************************************************************
  *		lineMakeCallW (TAPI32.@)
  */
diff --git a/dlls/tapi32/tapi32.spec b/dlls/tapi32/tapi32.spec
index 78cd63b1069..6d20bf3689d 100644
--- a/dlls/tapi32/tapi32.spec
+++ b/dlls/tapi32/tapi32.spec
@@ -69,6 +69,7 @@
 @ stdcall lineHold(long)
 @ stdcall lineInitialize(ptr long ptr str ptr)
 @ stdcall lineInitializeExA(ptr long ptr str ptr ptr ptr)
+@ stdcall lineInitializeExW(ptr long ptr wstr ptr ptr ptr)
 @ stdcall lineMakeCall(long ptr str long ptr) lineMakeCallA
 @ stdcall lineMakeCallA(long ptr str long ptr)
 @ stdcall lineMakeCallW(long ptr wstr long ptr)