diff --git a/doc/extension.ja.rdoc b/doc/extension.ja.rdoc
index d89fbd2003..6b3876e9c8 100644
--- a/doc/extension.ja.rdoc
+++ b/doc/extension.ja.rdoc
@@ -1227,6 +1227,8 @@ Data_Get_Struct(data, type, sval) ::
   TYPE(value)
   FIXNUM_P(value)
   NIL_P(value)
+  RB_INTEGER_TYPE_P(value)
+  RB_FLOAT_TYPE_P(value)
   void Check_Type(VALUE value, int type)
   SafeStringValue(value)
 
diff --git a/doc/extension.rdoc b/doc/extension.rdoc
index c2aff57ffc..1e157f824a 100644
--- a/doc/extension.rdoc
+++ b/doc/extension.rdoc
@@ -1161,6 +1161,14 @@ NIL_P(value) ::
 
   Is +value+ nil?
 
+RB_INTEGER_TYPE_P(value) ::
+
+  Is +value+ an Integer?
+
+RB_FLOAT_TYPE_P(value) ::
+
+  Is +value+ a Float?
+
 void Check_Type(VALUE value, int type) ::
 
   Ensures +value+ is of the given internal +type+ or raises a TypeError