diff --git a/dlls/riched20/editor.c b/dlls/riched20/editor.c
index 381443b..e3f91f1 100644
--- a/dlls/riched20/editor.c
+++ b/dlls/riched20/editor.c
@@ -473,15 +473,13 @@ static void ME_RTFParAttrHook(RTF_Info *info)
   case rtfFirstIndent:
     ME_GetSelectionParaFormat(info->editor, &fmt);
     fmt.dwMask = PFM_STARTINDENT | PFM_OFFSET;
-    fmt.dxStartIndent += info->rtfParam;
+    fmt.dxStartIndent += fmt.dxOffset + info->rtfParam;
     fmt.dxOffset = -info->rtfParam;
     break;
   case rtfLeftIndent:
-    /* we assume rtfLeftIndent is always specified before rtfFirstIndent */
     ME_GetSelectionParaFormat(info->editor, &fmt);
     fmt.dwMask = PFM_STARTINDENT;
-    fmt.dxStartIndent = info->rtfParam;
-    fmt.dxOffset = 0;
+    fmt.dxStartIndent = info->rtfParam - fmt.dxOffset;
     break;
   case rtfRightIndent:
     fmt.dwMask = PFM_RIGHTINDENT;