diff --git a/glm/gtc/quaternion.hpp b/glm/gtc/quaternion.hpp
index a7055fae..0832f7f3 100644
--- a/glm/gtc/quaternion.hpp
+++ b/glm/gtc/quaternion.hpp
@@ -170,6 +170,14 @@ namespace glm
 	template <typename T, precision P>
 	GLM_FUNC_DECL tquat<T, P> operator/(tquat<T, P> const & q, T const & s);
 
+	// -- Boolean operators --
+
+	template <typename T, precision P>
+	GLM_FUNC_DECL bool operator==(tquat<T, P> const & q1, tquat<T, P> const & q2);
+
+	template <typename T, precision P>
+	GLM_FUNC_DECL bool operator!=(tquat<T, P> const & q1, tquat<T, P> const & q2);
+
 	/// Returns the length of the quaternion.
 	/// 
 	/// @see gtc_quaternion