diff --git a/builtin.c b/builtin.c
index 3207704b28..3400c4976e 100644
--- a/builtin.c
+++ b/builtin.c
@@ -3,7 +3,7 @@
 #include "iseq.h"
 #include "builtin.h"
 
-#include "builtin_binary.inc"
+#include "builtin_binary.rbbin"
 
 #ifndef BUILTIN_BINARY_SIZE
 
diff --git a/common.mk b/common.mk
index 13300b7b47..4133f90aa8 100644
--- a/common.mk
+++ b/common.mk
@@ -738,7 +738,7 @@ clean-local:: clean-runnable
 	$(Q)$(RM) $(PROGRAM) $(WPROGRAM) miniruby$(EXEEXT) dmyext.$(OBJEXT) dmyenc.$(OBJEXT) $(ARCHFILE) .*.time
 	$(Q)$(RM) y.tab.c y.output encdb.h transdb.h config.log rbconfig.rb $(ruby_pc) $(COROUTINE_H:/Context.h=/.time)
 	$(Q)$(RM) probes.h probes.$(OBJEXT) probes.stamp ruby-glommed.$(OBJEXT) ruby.imp ChangeLog $(STATIC_RUBY)$(EXEEXT)
-	$(Q)$(RM) GNUmakefile.old Makefile.old $(arch)-fake.rb bisect.sh $(ENC_TRANS_D) builtin_binary.inc
+	$(Q)$(RM) GNUmakefile.old Makefile.old $(arch)-fake.rb bisect.sh $(ENC_TRANS_D) builtin_binary.rbbin
 	$(Q)$(RM) $(PRISM_BUILD_DIR)/.time $(PRISM_BUILD_DIR)/*/.time yjit_exit_locations.dump
 	-$(Q)$(RMALL) target
 	-$(Q) $(RMDIR) enc/jis enc/trans enc $(COROUTINE_H:/Context.h=) coroutine target \
@@ -1358,12 +1358,12 @@ preludes: {$(VPATH)}miniprelude.c
 	$(ECHO) making $@
 	$(Q) $(BASERUBY) $(tooldir)/mk_builtin_loader.rb $<
 
-$(BUILTIN_BINARY:yes=built)in_binary.inc: $(PREP) $(BUILTIN_RB_SRCS) $(srcdir)/template/builtin_binary.inc.tmpl
+$(BUILTIN_BINARY:yes=built)in_binary.rbbin: $(PREP) $(BUILTIN_RB_SRCS) $(srcdir)/template/builtin_binary.rbbin.tmpl
 	$(Q) $(MINIRUBY) $(tooldir)/generic_erb.rb -o $@ \
-		$(srcdir)/template/builtin_binary.inc.tmpl
+		$(srcdir)/template/builtin_binary.rbbin.tmpl
 	-$(Q) sha256sum $@ 2> $(NULL) || $(NULLCMD)
 
-$(BUILTIN_BINARY:no=builtin)_binary.inc:
+$(BUILTIN_BINARY:no=builtin)_binary.rbbin:
 	$(Q) echo> $@ // empty $(@F)
 
 $(BUILTIN_RB_INCS): $(top_srcdir)/tool/mk_builtin_loader.rb
diff --git a/depend b/depend
index 0c594c1918..df0ae1e610 100644
--- a/depend
+++ b/depend
@@ -779,7 +779,7 @@ builtin.$(OBJEXT): {$(VPATH)}backward/2/stdalign.h
 builtin.$(OBJEXT): {$(VPATH)}backward/2/stdarg.h
 builtin.$(OBJEXT): {$(VPATH)}builtin.c
 builtin.$(OBJEXT): {$(VPATH)}builtin.h
-builtin.$(OBJEXT): {$(VPATH)}builtin_binary.inc
+builtin.$(OBJEXT): {$(VPATH)}builtin_binary.rbbin
 builtin.$(OBJEXT): {$(VPATH)}config.h
 builtin.$(OBJEXT): {$(VPATH)}constant.h
 builtin.$(OBJEXT): {$(VPATH)}defines.h
diff --git a/template/builtin_binary.inc.tmpl b/template/builtin_binary.rbbin.tmpl
similarity index 95%
rename from template/builtin_binary.inc.tmpl
rename to template/builtin_binary.rbbin.tmpl
index 1e3fc63680..df835bbbf9 100644
--- a/template/builtin_binary.inc.tmpl
+++ b/template/builtin_binary.rbbin.tmpl
@@ -1,7 +1,7 @@
 // -*- c -*-
 // DO NOT MODIFY THIS FILE DIRECTLY.
 // auto-generated file by tool/generic_erb.rb
-// with template/builtin_binary.inc.tmpl
+// with template/builtin_binary.rbbin.tmpl
 % unless ARGV.include?('--cross=yes')
 %   ary = RubyVM.enum_for(:each_builtin).to_a
 %   ary.each{|feature, iseq|