diff --git a/lib/homesick/actions/file_actions.rb b/lib/homesick/actions/file_actions.rb
index 27e77f7..255010a 100644
--- a/lib/homesick/actions/file_actions.rb
+++ b/lib/homesick/actions/file_actions.rb
@@ -73,7 +73,7 @@ module Homesick
         when :conflict
           say_status :conflict, "#{destination} exists", :red
 
-          if collision_accepted?(destination)
+          if collision_accepted?(destination, source)
             FileUtils.rm_r destination, force: true unless options[:pretend]
             FileUtils.ln_s source, destination, force: true unless options[:pretend]
           end
diff --git a/lib/homesick/cli.rb b/lib/homesick/cli.rb
index 89dbf56..c82f34a 100644
--- a/lib/homesick/cli.rb
+++ b/lib/homesick/cli.rb
@@ -25,10 +25,13 @@ module Homesick
         exit(1)
       end
       # Hack in support for diffing symlinks
+      # Also adds support for checking if destination or content is a directory
       shell_metaclass = class << shell; self; end
       shell_metaclass.send(:define_method, :show_diff) do |destination, content|
         destination = Pathname.new(destination)
-        return super unless destination.symlink?
+        content = Pathname.new(content)
+        return 'Unable to create diff: destination or content is a directory' if destination.directory? || content.directory?
+        return super(destination, content) unless destination.symlink?
         say "- #{destination.readlink}", :red, true
         say "+ #{content.expand_path}", :green, true
       end
diff --git a/lib/homesick/utils.rb b/lib/homesick/utils.rb
index 1afe266..435224f 100644
--- a/lib/homesick/utils.rb
+++ b/lib/homesick/utils.rb
@@ -148,8 +148,8 @@ module Homesick
       first_p.mtime > second_p.mtime && !first_p.symlink?
     end
 
-    def collision_accepted?(destination)
-      fail "Argument must be an instance of Pathname, #{destination.class.name} given" unless destination.instance_of?(Pathname)
+    def collision_accepted?(destination, source)
+      fail "Arguments must be instances of Pathname, #{destination.class.name} and #{source.class.name} given" unless destination.instance_of?(Pathname) && source.instance_of?(Pathname)
       options[:force] || shell.file_collision(destination) { source }
     end