diff --git a/gtsam/base/Matrix.cpp b/gtsam/base/Matrix.cpp
index a262e9595..08d09b809 100644
--- a/gtsam/base/Matrix.cpp
+++ b/gtsam/base/Matrix.cpp
@@ -31,7 +31,6 @@ extern "C" {
 #ifdef GT_USE_LAPACK
 extern "C" {
 #include <cblas.h>
-#include <clapack.h>
 }
 #endif