diff --git a/contrib/DiscreteIntegration/Integration3D.h b/contrib/DiscreteIntegration/Integration3D.h
index 0748847f77744a4eec7cfe42a83730bebae38fb0..0e9ab75693097a6145d2e656b81fffb30a9bddd6 100644
--- a/contrib/DiscreteIntegration/Integration3D.h
+++ b/contrib/DiscreteIntegration/Integration3D.h
@@ -7,7 +7,7 @@
 #include <map>
 #include <cmath>
 #include "gmshLevelset.h"
-#include "PolynomialBasis.h"
+#include "polynomialBasis.h"
 #include "GmshDefines.h"
 
 // Element type