diff --git a/lib/semantic.rb b/lib/semantic.rb
index 801cafd..d0a9989 100644
--- a/lib/semantic.rb
+++ b/lib/semantic.rb
@@ -1,4 +1,4 @@
 module Semantic
-  GEM_VERSION = '1.6.0'
+  GEM_VERSION = '1.6.1'
   autoload :Version, 'semantic/version'
 end
diff --git a/lib/semantic/version.rb b/lib/semantic/version.rb
index 6984c48..7eda70c 100644
--- a/lib/semantic/version.rb
+++ b/lib/semantic/version.rb
@@ -27,7 +27,7 @@ def build=(b)
     end
 
     def identifiers(pre)
-      array = pre.split(".")
+      array = pre.split(/[\.\-]/)
       array.each_with_index {|e,i| array[i] = Integer(e) if /\A\d+\z/.match(e)}
       return array
     end
diff --git a/semantic-1.6.1.gem b/semantic-1.6.1.gem
new file mode 100644
index 0000000..a0b0b1d
Binary files /dev/null and b/semantic-1.6.1.gem differ
diff --git a/spec/version_spec.rb b/spec/version_spec.rb
index cb83c81..2ac8bd0 100644
--- a/spec/version_spec.rb
+++ b/spec/version_spec.rb
@@ -87,6 +87,9 @@
       @v1_5_9_pre_1 = Semantic::Version.new '1.5.9-pre.1'
       @v1_5_9_pre_1_build_5127 = Semantic::Version.new '1.5.9-pre.1+build.5127'
       @v1_5_9_pre_1_build_4352 = Semantic::Version.new '1.5.9-pre.1+build.4352'
+      # more pre syntax testing: "-"
+      @v3_13_0_75_generic = Semantic::Version.new '3.13.0-75-generic'
+      @v3_13_0_141_generic = Semantic::Version.new '3.13.0-141-generic'
 
       @v1_5_9 = Semantic::Version.new '1.5.9'
       @v1_6_0 = Semantic::Version.new '1.6.0'
@@ -132,6 +135,14 @@
       expect(ary.shuffle.sort).to eq(ary)
     end
 
+    it 'determine alternate char sep works in pre' do
+      expect((@v3_13_0_75_generic <=> @v3_13_0_141_generic.to_s)).to eq(-1)
+      expect((@v3_13_0_75_generic <=> @v3_13_0_141_generic)).to eq(-1)
+      expect((@v3_13_0_75_generic <=> '3.13.0-75-generic')).to eq(0)
+      expect((@v3_13_0_75_generic <=> '3.13.0-141-generic')).to eq(-1)
+      expect((@v3_13_0_141_generic <=> '3.13.0-75-generic')).to eq(1)
+    end
+
     it 'determines whether it is greater than another instance' do
       # These should be equal, since "Build metadata SHOULD be ignored
       # when determining version precedence".