diff --git a/layer0/Bezier.cpp b/layer0/Bezier.cpp
index 2d9482a66..584e5f38d 100644
--- a/layer0/Bezier.cpp
+++ b/layer0/Bezier.cpp
@@ -2,6 +2,7 @@
 
 #include "pymol/algorithm.h"
 
+#define GLM_ENABLE_EXPERIMENTAL
 #include <glm/gtx/io.hpp>
 
 namespace pymol