diff --git a/modules/lang/julia/autoload.el b/modules/lang/julia/autoload.el
index e74ff2d3a..b999631ad 100644
--- a/modules/lang/julia/autoload.el
+++ b/modules/lang/julia/autoload.el
@@ -9,6 +9,5 @@
       (apply #'make-comint-in-buffer "Julia" "*Julia*" julia-program julia-arguments))
     (pop-to-buffer buffer)
     (with-current-buffer buffer
-      (inferior-julia-mode))))
-
-
+      (inferior-julia-mode))
+    buffer))
diff --git a/modules/lang/julia/config.el b/modules/lang/julia/config.el
index 06d706ba2..385b49b7a 100644
--- a/modules/lang/julia/config.el
+++ b/modules/lang/julia/config.el
@@ -7,24 +7,24 @@
 
   ;; Borrow matlab.el's fontification of math operators
   ;; From <https://ogbe.net/emacsconfig.html>
-  (font-lock-add-keywords
-   'julia-mode
-   `((,(let ((OR "\\|"))
-         (concat "\\(" ;; stolen `matlab.el' operators first
-                 "[<>!]=?" OR
-                 "\\.[/*^']" OR
-                 "==" OR
-                 "=>" OR
-                 "\\<xor\\>" OR
-                 "[-+*\\/^&|$]=?" OR ;; this has to come before next (updating operators)
-                 "[-!^&|*+\\/~:]" OR
-                 ;; more extra julia operators follow
-                 "[%$]" OR
-                 ;; bitwise operators
-                 ">>>" OR ">>" OR "<<" OR
-                 ">>>=" OR ">>" OR "<<" OR
-                 ;; comparison
-                 "[<>!]=?" OR
-                 "\\)"))
-      1 font-lock-type-face))))
-
+  (dolist (mode '(julia-mode ess-julia-mode))
+    (font-lock-add-keywords
+     mode
+     `((,(let ((OR "\\|"))
+           (concat "\\(" ;; stolen `matlab.el' operators first
+                   "[<>!]=?" OR
+                   "\\.[/*^']" OR
+                   "==" OR
+                   "=>" OR
+                   "\\<xor\\>" OR
+                   "[-+*\\/^&|$]=?" OR ;; this has to come before next (updating operators)
+                   "[-!^&|*+\\/~:]" OR
+                   ;; more extra julia operators follow
+                   "[%$]" OR
+                   ;; bitwise operators
+                   ">>>" OR ">>" OR "<<" OR
+                   ">>>=" OR ">>" OR "<<" OR
+                   ;; comparison
+                   "[<>!]=?" OR
+                   "\\)"))
+        1 font-lock-type-face)))))