diff --git a/mrbgems/mruby-print/mrblib/print.rb b/mrbgems/mruby-print/mrblib/print.rb
index 96ee71fe9..a8a23ea90 100644
--- a/mrbgems/mruby-print/mrblib/print.rb
+++ b/mrbgems/mruby-print/mrblib/print.rb
@@ -47,11 +47,9 @@ module Kernel
       i += 1
     end
     __printstr__ "\n" if len == 0
-    nil
   end
 
   def printf(*args)
     __printstr__(sprintf(*args))
-    nil
   end
 end
diff --git a/mrbgems/mruby-print/src/print.c b/mrbgems/mruby-print/src/print.c
index 789808deb..b74edc9c4 100644
--- a/mrbgems/mruby-print/src/print.c
+++ b/mrbgems/mruby-print/src/print.c
@@ -43,7 +43,7 @@ mrb_printstr(mrb_state *mrb, mrb_value self)
   if (mrb_string_p(s)) {
     printstr(mrb, RSTRING_PTR(s), RSTRING_LEN(s));
   }
-  return s;
+  return mrb_nil_value();
 }
 
 void