diff --git a/expand-region-core.el b/expand-region-core.el
index ac62193..283267f 100644
--- a/expand-region-core.el
+++ b/expand-region-core.el
@@ -188,7 +188,7 @@ before calling `er/expand-region' for the first time."
          (msg (car msg-and-bindings))
          (bindings (cdr msg-and-bindings)))
     (when repeat-key
-      (set-temporary-overlay-map
+      (er/set-temporary-overlay-map
        (let ((map (make-sparse-keymap)))
          (dolist (binding bindings map)
            (define-key map (read-kbd-macro (car binding))
@@ -200,9 +200,10 @@ before calling `er/expand-region' for the first time."
        t)
       (or (minibufferp) (message "%s" msg)))))
 
-(when (not (fboundp 'set-temporary-overlay-map))
+(if (fboundp 'set-temporary-overlay-map)
+    (fset 'er/set-temporary-overlay-map 'set-temporary-overlay-map)
   ;; Backport this function from newer emacs versions
-  (defun set-temporary-overlay-map (map &optional keep-pred)
+  (defun er/set-temporary-overlay-map (map &optional keep-pred)
     "Set a new keymap that will only exist for a short period of time.
 The new keymap to use must be given in the MAP variable. When to
 remove the keymap depends on user input and KEEP-PRED:
diff --git a/nxml-mode-expansions.el b/nxml-mode-expansions.el
index b997cc0..c81b590 100644
--- a/nxml-mode-expansions.el
+++ b/nxml-mode-expansions.el
@@ -27,6 +27,7 @@
 
 ;;; Code:
 
+(require 'cl-lib)
 (require 'expand-region-core)
 (require 'html-mode-expansions)
 (require 'nxml-mode)
@@ -74,11 +75,10 @@ point is in, or otherwise nil"
   (save-excursion 
     (forward-char 1)
     (nxml-token-before))
-  (let ((attr (find-if (lambda (att) 
-                           (and (<= (xmltok-attribute-value-start att) (point))
-                                (>= (xmltok-attribute-value-end att) (point)))) 
-                         xmltok-attributes)))
-    attr))
+  (cl-find-if (lambda (att)
+		(and (<= (xmltok-attribute-value-start att) (point))
+		     (>= (xmltok-attribute-value-end att) (point))))
+	      xmltok-attributes))
 
 (defun er/mark-nxml-attribute-inner-string ()
   "Marks an attribute string"
diff --git a/subword-mode-expansions.el b/subword-mode-expansions.el
index ab131fb..8416021 100644
--- a/subword-mode-expansions.el
+++ b/subword-mode-expansions.el
@@ -29,6 +29,7 @@
 ;;; Code:
 
 (require 'expand-region-core)
+(require 'subword)
 
 (defun er/mark-subword ()
   "Mark a subword, a part of a CamelCase identifier."