diff --git a/Changelog b/Changelog
index 999c42d..e06b03d 100644
--- a/Changelog
+++ b/Changelog
@@ -1,6 +1,3 @@
-2.10.5
-- Fix a problem with frozen string in newer Ruby versions.
-
 2.10.4
 - Maintenance release.
 
diff --git a/lib/mini_exiftool.rb b/lib/mini_exiftool.rb
index 8dc0e3b..9147d3d 100644
--- a/lib/mini_exiftool.rb
+++ b/lib/mini_exiftool.rb
@@ -27,7 +27,7 @@
 # Simple OO access to the ExifTool command-line application.
 class MiniExiftool
 
-  VERSION = '2.10.5'
+  VERSION = '2.10.4'
 
   # Name of the ExifTool command-line application
   @@cmd = 'exiftool'
@@ -147,14 +147,14 @@ def load filename_or_io
     end
     @values.clear
     @changed_values.clear
-    params = ['-j']
-    params << ('-n' if @opts[:numerical])
-    params << ('-e' unless @opts[:composite])
-    params << ("-c #{escape(@opts[:coord_format])}" if @opts[:coord_format])
-    params << ('-fast' if @opts[:fast])
-    params << ('-fast2' if @opts[:fast2])
+    params = '-j '
+    params << (@opts[:numerical] ? '-n ' : '')
+    params << (@opts[:composite] ? '' : '-e ')
+    params << (@opts[:coord_format] ? "-c #{escape(@opts[:coord_format])}" : '')
+    params << (@opts[:fast] ? '-fast ' : '')
+    params << (@opts[:fast2] ? '-fast2 ' : '')
     params << generate_encoding_params
-    if run(cmd_gen(params.compact.join(' '), @filename))
+    if run(cmd_gen(params, @filename))
       parse_output
     else
       raise MiniExiftool::Error.new(@error_text)
@@ -225,14 +225,14 @@ def save
       original_tag = MiniExiftool.original_tag(tag)
       arr_val = val.kind_of?(Array) ? val : [val]
       arr_val.map! {|e| convert_before_save(e)}
-      params = ['-q -P -overwrite_original']
-      params << (arr_val.detect {|x| x.kind_of?(Numeric)} ? '-n' : '')
-      params << (@opts[:ignore_minor_errors] ? '-m' : '')
+      params = '-q -P -overwrite_original '
+      params << (arr_val.detect {|x| x.kind_of?(Numeric)} ? '-n ' : '')
+      params << (@opts[:ignore_minor_errors] ? '-m ' : '')
       params << generate_encoding_params
       arr_val.each do |v|
         params << %Q(-#{original_tag}=#{escape(v)} )
       end
-      result = run(cmd_gen(params.compact.join(' '), temp_filename))
+      result = run(cmd_gen(params, temp_filename))
       unless result
         all_ok = false
         @errors[tag] = @error_text.gsub(/Nothing to do.\n\z/, '').chomp
@@ -545,11 +545,13 @@ def escape val
   end
 
   def generate_encoding_params
-    @@encoding_types.map do |enc_type|
+    params = ''
+    @@encoding_types.each do |enc_type|
       if enc_val = @opts[MiniExiftool.encoding_opt(enc_type)]
-        "-charset #{enc_type}=#{enc_val}"
+        params << "-charset #{enc_type}=#{enc_val} "
       end
-    end.compact.join(' ')
+    end
+    params
   end
 
   # Backport YAML.unsafe_load
diff --git a/mini_exiftool.gemspec b/mini_exiftool.gemspec
index 2ba6d0c..7ba75a2 100644
--- a/mini_exiftool.gemspec
+++ b/mini_exiftool.gemspec
@@ -1,5 +1,5 @@
 # -*- encoding: utf-8 -*-
-# stub: mini_exiftool 2.10.5 ruby lib
+# stub: mini_exiftool 2.10.4 ruby lib
 #
 # This file is automatically generated by rim.
 # PLEASE DO NOT EDIT IT DIRECTLY!
@@ -7,7 +7,7 @@
 
 Gem::Specification.new do |s|
   s.name = "mini_exiftool"
-  s.version = "2.10.5"
+  s.version = "2.10.4"
 
   s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
   s.require_paths = ["lib"]