diff --git a/plugin/fzf.vim b/plugin/fzf.vim
index 126e16b..fd5874c 100644
--- a/plugin/fzf.vim
+++ b/plugin/fzf.vim
@@ -380,7 +380,6 @@ try
   endif
   if use_height
     let height = s:calc_size(&lines, dict.down, dict)
-    let $FZF_HEIGHT = height
     let optstr .= ' --height='.height
   elseif use_term
     let optstr .= ' --no-height'
diff --git a/src/terminal.go b/src/terminal.go
index 2802edd..5aab6cd 100644
--- a/src/terminal.go
+++ b/src/terminal.go
@@ -580,6 +580,7 @@ func (t *Terminal) resizeWindows() {
 				pwidth += 1
 			}
 			t.pwindow = t.tui.NewWindow(y+1, x+2, pwidth, h-2, tui.BorderNone)
+			os.Setenv("FZF_PREVIEW_HEIGHT", strconv.Itoa(h-2))
 		}
 		switch t.preview.position {
 		case posUp: