diff --git a/src/if_ruby.c b/src/if_ruby.c
index 3b9f476..3767bf3 100644
--- a/src/if_ruby.c
+++ b/src/if_ruby.c
@@ -396,7 +396,11 @@
 # endif
 
 # if defined(RUBY19_OR_LATER) && !defined(PROTO)
+#  if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 22
+long rb_num2long_stub(VALUE x)
+#  else
 SIGNED_VALUE rb_num2long_stub(VALUE x)
+#  endif
 {
     return dll_rb_num2long(x);
 }
@@ -421,7 +425,11 @@
 {
     return dll_rb_float_new(d);
 }
+#   if defined(DYNAMIC_RUBY_VER) && DYNAMIC_RUBY_VER >= 22
+unsigned long rb_num2ulong(VALUE x)
+#   else
 VALUE rb_num2ulong(VALUE x)
+#   endif
 {
     return (long)RSHIFT((SIGNED_VALUE)(x),1);
 }
diff --git a/src/version.c b/src/version.c
index 11dd808..0b2d6fe 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    705,
+/**/
     704,
 /**/
     703,