diff --git a/dlls/ntdll/nt.c b/dlls/ntdll/nt.c
index efcba6cae8b..5d5126ce8f8 100644
--- a/dlls/ntdll/nt.c
+++ b/dlls/ntdll/nt.c
@@ -760,9 +760,11 @@ NTSTATUS WINAPI NtQuerySystemInformation(
                     if (ret == STATUS_NO_MORE_FILES) ret = STATUS_SUCCESS;
 
                     /* now append process name */
-                    spi->pszProcessName = (WCHAR*)((char*)spi + spi->dwOffset);
-                    memcpy( spi->pszProcessName, procname, wlen - sizeof(WCHAR) );
-                    spi->pszProcessName[wlen / sizeof(WCHAR)] = 0;
+                    spi->ProcessName.Buffer = (WCHAR*)((char*)spi + spi->dwOffset);
+                    spi->ProcessName.Length = wlen - sizeof(WCHAR);
+                    spi->ProcessName.MaximumLength = wlen;
+                    memcpy( spi->ProcessName.Buffer, procname, spi->ProcessName.Length );
+                    spi->ProcessName.Buffer[spi->ProcessName.Length / sizeof(WCHAR)] = 0;
                     len += wlen;
                     spi->dwOffset += wlen;
 
diff --git a/include/winternl.h b/include/winternl.h
index 93f93641fe1..cd77ee87348 100644
--- a/include/winternl.h
+++ b/include/winternl.h
@@ -1082,8 +1082,7 @@ typedef struct _SYSTEM_PROCESS_INFORMATION {
     FILETIME ftCreationTime;
     FILETIME ftUserTime;
     FILETIME ftKernelTime;
-    DWORD dwUnknown2;
-    WCHAR *pszProcessName;
+    UNICODE_STRING ProcessName;
     DWORD dwBasePriority;
     DWORD dwProcessID;
     DWORD dwParentProcessID;