diff --git a/build_config/default.rb b/build_config/default.rb
index 69943a7d3..21795b453 100644
--- a/build_config/default.rb
+++ b/build_config/default.rb
@@ -60,7 +60,7 @@ MRuby::Build.new do |conf|
   # gperf settings
   # conf.gperf do |gperf|
   #   gperf.command = 'gperf'
-  #   gperf.compile_options = %q[-L ANSI-C -C -p -j1 -i 1 -g -o -t -N mrb_reserved_word -k"1,3,$" "%{infile}" > "%{outfile}"]
+  #   gperf.compile_options = %q[-L ANSI-C -C -j1 -i 1 -o -t -N mrb_reserved_word -k"1,3,$" "%{infile}" > "%{outfile}"]
   # end
 
   # file extensions
diff --git a/lib/mruby/build/command.rb b/lib/mruby/build/command.rb
index 970264407..773166a4f 100644
--- a/lib/mruby/build/command.rb
+++ b/lib/mruby/build/command.rb
@@ -266,7 +266,7 @@ module MRuby
     def initialize(build)
       super
       @command = 'gperf'
-      @compile_options = %q[-L ANSI-C -C -p -j1 -i 1 -g -o -t -N mrb_reserved_word -k"1,3,$" "%{infile}" > "%{outfile}"]
+      @compile_options = %q[-L ANSI-C -C -j1 -i 1 -o -t -N mrb_reserved_word -k"1,3,$" "%{infile}" > "%{outfile}"]
     end
 
     def run(outfile, infile)
diff --git a/tasks/toolchains/visualcpp.rake b/tasks/toolchains/visualcpp.rake
index 53954e9a5..b23793f5a 100644
--- a/tasks/toolchains/visualcpp.rake
+++ b/tasks/toolchains/visualcpp.rake
@@ -35,7 +35,7 @@ MRuby::Toolchain.new(:visualcpp) do |conf, _params|
 
   conf.gperf do |gperf|
     gperf.command = 'gperf.exe'
-    gperf.compile_options = %q[-L ANSI-C -C -p -j1 -i 1 -g -o -t -N mrb_reserved_word -k"1,3,$" "%{infile}" > "%{outfile}"]
+    gperf.compile_options = %q[-L ANSI-C -C -j1 -i 1 -o -t -N mrb_reserved_word -k"1,3,$" "%{infile}" > "%{outfile}"]
   end
 
   conf.exts do |exts|