diff --git a/Rakefile b/Rakefile
index 8fb17eb4..7f57b4a7 100644
--- a/Rakefile
+++ b/Rakefile
@@ -113,20 +113,18 @@ VALGRIND_MEMORYFILL_OPTIONS = [
 GDB_OPTIONS = []
 
 task :console do |task|
-  cmd = ["irb", "-r './lib/nmatrix.rb'"]
-  run *cmd
+  run("irb", "-r './lib/nmatrix.rb'")
 end
 
 task :pry do |task|
-  cmd = ["pry", "-r './lib/nmatrix.rb'"]
-  run *cmd
+  run("pry", "-r './lib/nmatrix.rb'")
 end
 
 namespace :pry do
   task valgrind: [:compile] do |task|
     cmd  = ["valgrind"] + VALGRIND_OPTIONS
     cmd += ["ruby", "-Ilib:ext", "-r './lib/nmatrix.rb'", "-r 'pry'", "-e 'binding.pry'"]
-    run *cmd
+    run(*cmd)
   end
 end
 
diff --git a/lib/nmatrix/io/point_cloud.rb b/lib/nmatrix/io/point_cloud.rb
index b711768e..66283eb7 100644
--- a/lib/nmatrix/io/point_cloud.rb
+++ b/lib/nmatrix/io/point_cloud.rb
@@ -122,7 +122,7 @@ def initialize filename
       raise(IOError, "premature end of file") if i < points[0]
     end
 
-    attr_accessor *ENTRIES
+    attr_accessor(*ENTRIES)
     attr_reader :matrix
 
     protected