diff --git a/glm/core/type_vec1.hpp b/glm/core/type_vec1.hpp
index b8fb5587..b1c5eb6a 100644
--- a/glm/core/type_vec1.hpp
+++ b/glm/core/type_vec1.hpp
@@ -43,6 +43,7 @@ namespace detail
 
 		typedef tvec1<T, P> type;
 		typedef tvec1<bool, P> bool_type;
+		typedef T value_type;
 
 		GLM_FUNC_DECL GLM_CONSTEXPR int length() const;
 
diff --git a/glm/core/type_vec2.hpp b/glm/core/type_vec2.hpp
index f901646b..04480259 100644
--- a/glm/core/type_vec2.hpp
+++ b/glm/core/type_vec2.hpp
@@ -43,6 +43,7 @@ namespace detail
 
 		typedef tvec2<T, P> type;
 		typedef tvec2<bool, P> bool_type;
+		typedef T value_type;
 
 		GLM_FUNC_DECL GLM_CONSTEXPR int length() const;
 
diff --git a/glm/core/type_vec3.hpp b/glm/core/type_vec3.hpp
index 41f1f696..89d6cb02 100644
--- a/glm/core/type_vec3.hpp
+++ b/glm/core/type_vec3.hpp
@@ -43,6 +43,7 @@ namespace detail
 
 		typedef tvec3<T, P> type;
 		typedef tvec3<bool, P> bool_type;
+		typedef T value_type;
 
 		GLM_FUNC_DECL GLM_CONSTEXPR int length() const;
 
diff --git a/glm/core/type_vec4.hpp b/glm/core/type_vec4.hpp
index fb77be2f..4da7a7b9 100644
--- a/glm/core/type_vec4.hpp
+++ b/glm/core/type_vec4.hpp
@@ -43,6 +43,7 @@ namespace detail
 
 		typedef tvec4<T, P> type;
 		typedef tvec4<bool, P> bool_type;
+		typedef T value_type;
 
 		GLM_FUNC_DECL GLM_CONSTEXPR int length() const;