diff --git a/lib/lrama/output.rb b/lib/lrama/output.rb
index dd71814a..757d16e2 100644
--- a/lib/lrama/output.rb
+++ b/lib/lrama/output.rb
@@ -252,7 +252,7 @@ def user_args
     end
 
     def extract_param_name(param)
-      /\A(.)+([a-zA-Z0-9_]+)\z/.match(param)[2]
+      /\A(\W*)([a-zA-Z0-9_]+)\z/.match(param.split.last)[2]
     end
 
     def parse_param_name
diff --git a/spec/lrama/output_spec.rb b/spec/lrama/output_spec.rb
index 4afae322..4b5a9049 100644
--- a/spec/lrama/output_spec.rb
+++ b/spec/lrama/output_spec.rb
@@ -25,6 +25,20 @@
 
       allow(grammar).to receive(:parse_param).and_return("{ struct parser_params *p  }")
       expect(output.parse_param).to eq("struct parser_params *p")
+
+
+      allow(grammar).to receive(:parse_param).and_return("{int i}")
+      expect(output.parse_param).to eq("int i")
+
+      allow(grammar).to receive(:parse_param).and_return("{ int i  }")
+      expect(output.parse_param).to eq("int i")
+
+
+      allow(grammar).to receive(:parse_param).and_return("{int parse_param}")
+      expect(output.parse_param).to eq("int parse_param")
+
+      allow(grammar).to receive(:parse_param).and_return("{ int parse_param  }")
+      expect(output.parse_param).to eq("int parse_param")
     end
   end
 
@@ -36,6 +50,20 @@
 
         allow(grammar).to receive(:parse_param).and_return("{ struct parser_params *p  }")
         expect(output.user_formals).to eq(", struct parser_params *p")
+
+
+        allow(grammar).to receive(:parse_param).and_return("{int i}")
+        expect(output.user_formals).to eq(", int i")
+
+        allow(grammar).to receive(:parse_param).and_return("{ int i  }")
+        expect(output.user_formals).to eq(", int i")
+
+
+        allow(grammar).to receive(:parse_param).and_return("{int parse_param}")
+        expect(output.user_formals).to eq(", int parse_param")
+
+        allow(grammar).to receive(:parse_param).and_return("{ int parse_param  }")
+        expect(output.user_formals).to eq(", int parse_param")
       end
     end
 
@@ -55,6 +83,20 @@
 
         allow(grammar).to receive(:parse_param).and_return("{ struct parser_params *p  }")
         expect(output.user_args).to eq(", p")
+
+
+        allow(grammar).to receive(:parse_param).and_return("{int i}")
+        expect(output.user_args).to eq(", i")
+
+        allow(grammar).to receive(:parse_param).and_return("{ int i  }")
+        expect(output.user_args).to eq(", i")
+
+
+        allow(grammar).to receive(:parse_param).and_return("{int parse_param}")
+        expect(output.user_args).to eq(", parse_param")
+
+        allow(grammar).to receive(:parse_param).and_return("{ int parse_param  }")
+        expect(output.user_args).to eq(", parse_param")
       end
     end
 
@@ -73,6 +115,20 @@
 
       allow(grammar).to receive(:parse_param).and_return("{ struct parser_params *p  }")
       expect(output.parse_param_name).to eq("p")
+
+
+      allow(grammar).to receive(:parse_param).and_return("{int i}")
+      expect(output.parse_param_name).to eq("i")
+
+      allow(grammar).to receive(:parse_param).and_return("{ int i  }")
+      expect(output.parse_param_name).to eq("i")
+
+
+      allow(grammar).to receive(:parse_param).and_return("{int parse_param}")
+      expect(output.parse_param_name).to eq("parse_param")
+
+      allow(grammar).to receive(:parse_param).and_return("{ int parse_param  }")
+      expect(output.parse_param_name).to eq("parse_param")
     end
   end
 
@@ -83,6 +139,20 @@
 
       allow(grammar).to receive(:lex_param).and_return("{ struct parser_params *p  }")
       expect(output.lex_param_name).to eq("p")
+
+
+      allow(grammar).to receive(:lex_param).and_return("{int i}")
+      expect(output.lex_param_name).to eq("i")
+
+      allow(grammar).to receive(:lex_param).and_return("{ int i  }")
+      expect(output.lex_param_name).to eq("i")
+
+
+      allow(grammar).to receive(:lex_param).and_return("{int lex_param}")
+      expect(output.lex_param_name).to eq("lex_param")
+
+      allow(grammar).to receive(:lex_param).and_return("{ int lex_param  }")
+      expect(output.lex_param_name).to eq("lex_param")
     end
   end
 end