diff --git a/glm/ext/quaternion_relational.inl b/glm/ext/quaternion_relational.inl
index 286a8e39..be071c29 100644
--- a/glm/ext/quaternion_relational.inl
+++ b/glm/ext/quaternion_relational.inl
@@ -1,3 +1,5 @@
+#include "../detail/compute_vector_relational.hpp"
+
 namespace glm
 {
 	template<typename T, qualifier Q>