diff --git a/dlls/msi/tests/install.c b/dlls/msi/tests/install.c
index 0bf7a6aeee4..da4e383123d 100644
--- a/dlls/msi/tests/install.c
+++ b/dlls/msi/tests/install.c
@@ -7207,7 +7207,7 @@ static DWORD get_pf_file_size(LPCSTR file)
 
     hfile = CreateFileA(path, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
     if (hfile == INVALID_HANDLE_VALUE)
-        return 0;
+        return INVALID_FILE_SIZE;
 
     size = GetFileSize(hfile, NULL);
     CloseHandle(hfile);
diff --git a/dlls/msi/tests/patch.c b/dlls/msi/tests/patch.c
index 41651abe245..ff6d3992c3b 100644
--- a/dlls/msi/tests/patch.c
+++ b/dlls/msi/tests/patch.c
@@ -213,7 +213,7 @@ static DWORD get_pf_file_size( const char *filename )
 
     file = CreateFileA( path, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL );
     if (file == INVALID_HANDLE_VALUE)
-        return 0;
+        return INVALID_FILE_SIZE;
 
     size = GetFileSize( file, NULL );
     CloseHandle( file );