diff --git a/wrapper.go b/wrapper.go
index 097cd2c..fe1298c 100644
--- a/wrapper.go
+++ b/wrapper.go
@@ -186,6 +186,7 @@ func (s *State) toValueUnsafe(index int) (interface{}, error) {
 
 func (s *State) GetType(index int) LuaType  { return LuaType(C.lua_type(s.L, C.int(index))) }
 func (s *State) IsString(index int) bool    { return s.GetType(index) == TypeString }
+func (s *State) IsNumber(index int) bool    { return s.GetType(index) == TypeNumber }
 func (s *State) IsFunction(index int) bool  { return s.GetType(index) == TypeFunction }
 func (s *State) IsTable(index int) bool     { return s.GetType(index) == TypeTable }
 func (s *State) ToBoolean(index int) bool   { return C.lua_toboolean(s.L, C.int(index)) != 0 }