diff --git a/src/Make_cyg_ming.mak b/src/Make_cyg_ming.mak
index fe4c5fc..28fa9b0 100644
--- a/src/Make_cyg_ming.mak
+++ b/src/Make_cyg_ming.mak
@@ -348,36 +348,39 @@
 #	Ruby interface:
 #	  RUBY=[Path to Ruby directory] (Set inside Make_cyg.mak or Make_ming.mak)
 #	  DYNAMIC_RUBY=yes (to load the Ruby DLL dynamically)
-#	  RUBY_VER=[Ruby version, eg 18, 19, 20] (default is 18)
-#	  RUBY_VER_LONG=[Ruby version, eg 1.8, 1.9.1, 2.0.0] (default is 1.8)
-#	    You must set RUBY_VER_LONG when changing RUBY_VER.
-#	    RUBY_API_VER is derived from RUBY_VER_LONG.
+#	  RUBY_VER=[Ruby version, eg 19, 22] (default is 22)
+#	  RUBY_API_VER_LONG=[Ruby API version, eg 1.8, 1.9.1, 2.2.0]
+#			    (default is 2.2.0)
+#	    You must set RUBY_API_VER_LONG when changing RUBY_VER.
 #	    Note: If you use Ruby 1.9.3, set as follows:
 #	      RUBY_VER=19
-#	      RUBY_VER_LONG=1.9.1 (not 1.9.3, because the API version is 1.9.1.)
+#	      RUBY_API_VER_LONG=1.9.1 (not 1.9.3, because the API version is 1.9.1.)
 ifdef RUBY
 ifndef DYNAMIC_RUBY
 DYNAMIC_RUBY=yes
 endif
 #  Set default value
 ifndef RUBY_VER
-RUBY_VER = 18
+RUBY_VER = 22
 endif
 ifndef RUBY_VER_LONG
-RUBY_VER_LONG = 1.8
+RUBY_VER_LONG = 2.2.0
+endif
+ifndef RUBY_API_VER_LONG
+RUBY_API_VER_LONG = $(RUBY_API_VER_LONG)
 endif
 ifndef RUBY_API_VER
-RUBY_API_VER = $(subst .,,$(RUBY_VER_LONG))
+RUBY_API_VER = $(subst .,,$(RUBY_API_VER_LONG))
 endif
 
 ifndef RUBY_PLATFORM
 ifeq ($(RUBY_VER), 16)
 RUBY_PLATFORM = i586-mswin32
 else
-ifneq ($(wildcard $(RUBY)/lib/ruby/$(RUBY_VER_LONG)/i386-mingw32),)
+ifneq ($(wildcard $(RUBY)/lib/ruby/$(RUBY_API_VER_LONG)/i386-mingw32),)
 RUBY_PLATFORM = i386-mingw32
 else
-ifneq ($(wildcard $(RUBY)/lib/ruby/$(RUBY_VER_LONG)/x64-mingw32),)
+ifneq ($(wildcard $(RUBY)/lib/ruby/$(RUBY_API_VER_LONG)/x64-mingw32),)
 RUBY_PLATFORM = x64-mingw32
 else
 RUBY_PLATFORM = i386-mswin32
@@ -406,9 +409,9 @@
 RUBY_19_OR_LATER = 1
 endif
 
-RUBYINC = -I $(RUBY)/lib/ruby/$(RUBY_VER_LONG)/$(RUBY_PLATFORM)
+RUBYINC = -I $(RUBY)/lib/ruby/$(RUBY_API_VER_LONG)/$(RUBY_PLATFORM)
 ifdef RUBY_19_OR_LATER
-RUBYINC += -I $(RUBY)/include/ruby-$(RUBY_VER_LONG) -I $(RUBY)/include/ruby-$(RUBY_VER_LONG)/$(RUBY_PLATFORM)
+RUBYINC += -I $(RUBY)/include/ruby-$(RUBY_API_VER_LONG) -I $(RUBY)/include/ruby-$(RUBY_API_VER_LONG)/$(RUBY_PLATFORM)
 endif
 ifeq (no, $(DYNAMIC_RUBY))
 RUBYLIB = -L$(RUBY)/lib -l$(RUBY_INSTALL_NAME)