diff --git a/lib/lrama/option_parser.rb b/lib/lrama/option_parser.rb
index fdd41d27..60da58d7 100644
--- a/lib/lrama/option_parser.rb
+++ b/lib/lrama/option_parser.rb
@@ -143,19 +143,20 @@ def aliased_report_option(opt)
       locations scan parse bitsets grammar resource
       sets muscles tools m4-early m4 skeleton ielr cex
     ].freeze
+    SUPPORTED_TRACES = VALID_TRACES - NOT_SUPPORTED_TRACES
 
     def validate_trace(trace)
       h = {}
       return h if trace.empty? || trace == ['none']
-      supported = VALID_TRACES - NOT_SUPPORTED_TRACES - %w[only-explicit-rules]
+      all_traces = SUPPORTED_TRACES - %w[only-explicit-rules]
       if trace == ['all']
-        supported.each { |t| h[t.to_sym] = true }
+        all_traces.each { |t| h[t.gsub(/-/, '_').to_sym] = true }
         return h
       end
 
       trace.each do |t|
-        if supported.include?(t)
-          h[t.to_sym] = true
+        if SUPPORTED_TRACES.include?(t)
+          h[t.gsub(/-/, '_').to_sym] = true
         else
           raise "Invalid trace option \"#{t}\"."
         end
diff --git a/spec/lrama/option_parser_spec.rb b/spec/lrama/option_parser_spec.rb
index fb620ea8..22560dd7 100644
--- a/spec/lrama/option_parser_spec.rb
+++ b/spec/lrama/option_parser_spec.rb
@@ -170,9 +170,15 @@
     end
 
     context "when valid options are passed" do
+      let(:valid_traces) do
+        %w[automaton closure rules only-explicit-rules actions time]
+      end
+
       it "returns option hash" do
-        opts = option_parser.send(:validate_trace, ["automaton", "closure"])
-        expect(opts).to eq({automaton: true, closure: true})
+        opts = option_parser.send(:validate_trace, valid_traces)
+        expect(opts).to eq({
+          only_explicit_rules: true, actions: true, automaton: true, closure: true, rules: true, time: true
+        })
       end
 
       context "when all is passed" do