diff --git a/Geo/Curvature.cpp b/Geo/Curvature.cpp
index 05195fbba0b7bd22bce12cfdf11b7ceb9aba92c4..99f2362b444f7c7af300c48337819a4a2b3df2d8 100644
--- a/Geo/Curvature.cpp
+++ b/Geo/Curvature.cpp
@@ -10,7 +10,7 @@
 #include "GFaceCompound.h"
 #include "MLine.h"
 #include "GRbf.h"
-#include "Os.h"
+#include "OS.h"
 #include "SBoundingBox3d.h"
 
 #include<iostream>