diff --git a/style/amsmath.el b/style/amsmath.el
index a2b7831f..ac541145 100644
--- a/style/amsmath.el
+++ b/style/amsmath.el
@@ -151,6 +151,15 @@
                    ("flalign"    . LaTeX-amsmath-label)
                    ("gather"     . LaTeX-amsmath-label))))
 
+   (setq-local LaTeX-indent-environment-list
+               (append LaTeX-indent-environment-list
+                       '(("alignat"   LaTeX-indent-tabular)
+                         ("xalignat"  LaTeX-indent-tabular)
+                         ("multline"  LaTeX-indent-tabular)
+                         ("flalign"   LaTeX-indent-tabular)
+                         ("aligned"   LaTeX-indent-tabular)
+                         ("alignedat" LaTeX-indent-tabular))))
+
    (set (make-local-variable 'TeX-braces-association)
         (append '(("\\lvert" . "\\rvert")
                   ("\\lVert" . "\\rVert"))