diff --git a/c++/contourgl/contourgl.cpp b/c++/contourgl/contourgl.cpp
index 14d1b0a..9da6579 100644
--- a/c++/contourgl/contourgl.cpp
+++ b/c++/contourgl/contourgl.cpp
@@ -15,13 +15,11 @@
along with this program. If not, see .
*/
-#include
+#include
#include
-#include
#include
-#include
-#include