--- tex-buf.el~	2017-09-29 01:14:51.554511000 +0900
+++ tex-buf.el	2017-09-29 01:22:41.640439000 +0900
@@ -540,7 +540,16 @@
     ;; Now start the process
     (setq file (funcall file))
     (TeX-process-set-variable file 'TeX-command-next TeX-command-Show)
-    (funcall hook name command file)))
+    (funcall hook name command file)
+
+    (if (and TeX-view-keep-focus
+	     (string= name "View"))
+	    (cond ((fboundp #'select-frame-set-input-focus)
+		   (select-frame-set-input-focus (selected-frame)))
+		  ((fboundp #'x-focus-frame)
+		   (x-focus-frame (selected-frame)))
+		  ((fboundp #'focus-frame)
+		   (focus-frame (selected-frame)))))))
 
 (defvar TeX-command-text)               ;Dynamically scoped.
 (defvar TeX-command-pos)                ;Dynamically scoped.