diff --git a/tool/make-snapshot b/tool/make-snapshot
index 89aad4b932..10bcd86be5 100755
--- a/tool/make-snapshot
+++ b/tool/make-snapshot
@@ -285,6 +285,14 @@ def package(vcs, rev, destdir, tmp = nil)
 
   open("#{v}/revision.h", "wb") {|f| f.puts "#define RUBY_REVISION #{revision}"}
   version ||= (versionhdr = IO.read("#{v}/version.h"))[RUBY_VERSION_PATTERN, 1]
+  version ||=
+    begin
+      include_ruby_versionhdr = IO.read("#{v}/include/ruby/version.h")
+      api_major_version = include_ruby_versionhdr[/^\#define\s+RUBY_API_VERSION_MAJOR\s+([\d.]+)/, 1]
+      api_minor_version = include_ruby_versionhdr[/^\#define\s+RUBY_API_VERSION_MINOR\s+([\d.]+)/, 1]
+      version_teeny = versionhdr[/^\#define\s+RUBY_VERSION_TEENY\s+(\d+)/, 1]
+      [api_major_version, api_minor_version, version_teeny].join('.')
+    end
   version or return
   if patchlevel
     unless tag.empty?
@@ -384,6 +392,9 @@ def package(vcs, rev, destdir, tmp = nil)
         "BASERUBY"=>baseruby,
         "PWD"=>Dir.pwd,
         "ruby_version"=>version,
+        "MAJOR"=>api_major_version,
+        "MINOR"=>api_minor_version,
+        "TEENY"=>version_teeny,
       }
       status.scan(/^s([%,])@([A-Za-z_][A-Za-z_0-9]*)@\1(.*?)\1g$/) do
         vars[$2] ||= $3
diff --git a/tool/mkconfig.rb b/tool/mkconfig.rb
index 74736540cd..edfdda203b 100755
--- a/tool/mkconfig.rb
+++ b/tool/mkconfig.rb
@@ -201,6 +201,12 @@ IO.foreach(File.join(srcdir, "version.h")) do |l|
     break if versions.size == 4
     next
   end
+  m = /^\s*#\s*define\s+RUBY_VERSION_(\w+)\s+(-?\d+)/.match(l)
+  if m
+    versions[m[1]] = m[2]
+    break if versions.size == 4
+    next
+  end
   m = /^\s*#\s*define\s+RUBY_VERSION\s+\W?([.\d]+)/.match(l)
   if m
     versions['MAJOR'], versions['MINOR'], versions['TEENY'] = m[1].split('.')
@@ -208,6 +214,16 @@ IO.foreach(File.join(srcdir, "version.h")) do |l|
     next
   end
 end
+if versions.size != 4
+  IO.foreach(File.join(srcdir, "include/ruby/version.h")) do |l|
+    m = /^\s*#\s*define\s+RUBY_API_VERSION_(\w+)\s+(-?\d+)/.match(l)
+    if m
+      versions[m[1]] ||= m[2]
+      break if versions.size == 4
+      next
+    end
+  end
+end
 %w[MAJOR MINOR TEENY PATCHLEVEL].each do |v|
   print "  CONFIG[#{v.dump}] = #{(versions[v]||vars[v]).dump}\n"
 end