diff --git a/dlls/ole32/storage32.c b/dlls/ole32/storage32.c
index bf1c1b30217..2bc9d3d568a 100644
--- a/dlls/ole32/storage32.c
+++ b/dlls/ole32/storage32.c
@@ -8900,7 +8900,7 @@ HRESULT WINAPI StgOpenStorage(
    * Refuse to open the file if it's too small to be a structured storage file
    * FIXME: verify the file when reading instead of here
    */
-  if (GetFileSize(hFile, NULL) < 0x100)
+  if (GetFileSize(hFile, NULL) < HEADER_SIZE)
   {
     CloseHandle(hFile);
     hr = STG_E_FILEALREADYEXISTS;