diff --git a/dlls/msi/msiserver.idl b/dlls/msi/msiserver.idl
index a626e8c303f..12045eb8f96 100644
--- a/dlls/msi/msiserver.idl
+++ b/dlls/msi/msiserver.idl
@@ -67,9 +67,9 @@ library WindowsInstaller
                 [in] VARIANT PackagePath,
                 [in, optional, defaultvalue(0)] long Options);
         [id(DISPID_INSTALLER_OPENDATABASE)]
-		Database *OpenDatabase(
-		    [in] BSTR DatabasePath,
-		    [in] VARIANT OpenMode);
+            Database *OpenDatabase(
+                    [in] BSTR DatabasePath,
+                    [in] VARIANT OpenMode);
         [id(DISPID_INSTALLER_INSTALLPRODUCT)]
             void InstallProduct(
                 [in] BSTR PackagePath,