diff --git a/Solver/multiscaleLaplace.cpp b/Solver/multiscaleLaplace.cpp
index 7f3e0ed9afc952f1ce329dccf7c56ed1834125fa..43202418474272f16af16af370500b8dc761c964 100644
--- a/Solver/multiscaleLaplace.cpp
+++ b/Solver/multiscaleLaplace.cpp
@@ -9,6 +9,7 @@
 #include "dofManager.h"
 #include "laplaceTerm.h"
 #include "linearSystemCSR.h"
+#include "linearSystemGmm.h"
 #include "linearSystemFull.h"
 #include "MTriangle.h"
 #include "robustPredicates.h"