diff --git a/dlls/tapi32/line.c b/dlls/tapi32/line.c
index 83389131346..a4f21a250c5 100644
--- a/dlls/tapi32/line.c
+++ b/dlls/tapi32/line.c
@@ -1468,6 +1468,15 @@ DWORD WINAPI lineSetDevConfigA(DWORD dwDeviceID, LPVOID lpDeviceConfig, DWORD dw
     return 0;
 }
 
+/***********************************************************************
+ *		lineSetDevConfigW (TAPI32.@)
+ */
+DWORD WINAPI lineSetDevConfigW(DWORD dwDeviceID, LPVOID lpDeviceConfig, DWORD dwSize, LPCWSTR lpszDeviceClass)
+{
+    FIXME("(%08lx, %p, %08lx, %s): stub.\n", dwDeviceID, lpDeviceConfig, dwSize, debugstr_w(lpszDeviceClass));
+    return 0;
+}
+
 /***********************************************************************
  *		lineSetMediaControl (TAPI32.@)
  */
diff --git a/dlls/tapi32/tapi32.spec b/dlls/tapi32/tapi32.spec
index 64ac36310dc..efb684161a1 100644
--- a/dlls/tapi32/tapi32.spec
+++ b/dlls/tapi32/tapi32.spec
@@ -110,6 +110,7 @@
 @ stdcall lineSetCurrentLocation(long long)
 @ stdcall lineSetDevConfig(long ptr long str) lineSetDevConfigA
 @ stdcall lineSetDevConfigA(long ptr long str)
+@ stdcall lineSetDevConfigW(long ptr long wstr)
 @ stdcall lineSetMediaControl(long long long long ptr long ptr long ptr long ptr long)
 @ stdcall lineSetMediaMode(long long)
 @ stdcall lineSetNumRings(long long long)