diff --git a/reactos/include/reactos/win32k/ntuser.h b/reactos/include/reactos/win32k/ntuser.h
index e73c43653c9..9247a7315af 100644
--- a/reactos/include/reactos/win32k/ntuser.h
+++ b/reactos/include/reactos/win32k/ntuser.h
@@ -1825,7 +1825,7 @@ DWORD
 NTAPI
 NtUserGetAtomName(
     ATOM nAtom,
-    LPWSTR lpBuffer);
+    PUNICODE_STRING pBuffer);
 
 UINT
 NTAPI
diff --git a/reactos/subsystems/win32/win32k/ntuser/ntstubs.c b/reactos/subsystems/win32/win32k/ntuser/ntstubs.c
index 2b4ad7df1a4..2d88789c99d 100644
--- a/reactos/subsystems/win32/win32k/ntuser/ntstubs.c
+++ b/reactos/subsystems/win32/win32k/ntuser/ntstubs.c
@@ -628,16 +628,6 @@ NtUserGetAppImeLevel(
     return 0;
 }
 
-DWORD
-APIENTRY
-NtUserGetAtomName(
-    ATOM nAtom,
-    LPWSTR lpBuffer)
-{
-    STUB;
-    return 0;
-}
-
 DWORD
 APIENTRY
 NtUserGetImeInfoEx(
diff --git a/reactos/subsystems/win32/win32k/ntuser/useratom.c b/reactos/subsystems/win32/win32k/ntuser/useratom.c
index 7b8469cf8e1..8118777a684 100644
--- a/reactos/subsystems/win32/win32k/ntuser/useratom.c
+++ b/reactos/subsystems/win32/win32k/ntuser/useratom.c
@@ -78,4 +78,27 @@ IntAddGlobalAtom(LPWSTR lpBuffer, BOOL PinAtom)
    return Atom;
 }
 
+DWORD
+APIENTRY
+NtUserGetAtomName(
+    ATOM nAtom,
+    PUNICODE_STRING pBuffer)
+{
+   DWORD Ret;
+   UNICODE_STRING CapturedName = {0};
+   UserEnterShared();
+   _SEH2_TRY
+   {
+      CapturedName = ProbeForReadUnicodeString(pBuffer);
+      Ret = IntGetAtomName((RTL_ATOM)nAtom, CapturedName.Buffer, (ULONG)CapturedName.Length);
+   }
+   _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+   {
+      Ret = 0;
+   }
+   _SEH2_END
+   UserLeave();
+   return Ret;
+}
+
 /* EOF */