diff --git a/cpp/dolfinx/common/defines.cpp b/cpp/dolfinx/common/defines.cpp
index 99c0757582f..b8d2e683a70 100644
--- a/cpp/dolfinx/common/defines.cpp
+++ b/cpp/dolfinx/common/defines.cpp
@@ -5,7 +5,6 @@
 // SPDX-License-Identifier:    LGPL-3.0-or-later
 
 #include "defines.h"
-#include <petscsys.h>
 
 //-------------------------------------------------------------------------
 std::string dolfinx::version() { return std::string(DOLFINX_VERSION); }