diff --git a/dumux/material/fluidmatrixinteractions/mp/mpadapter.hh b/dumux/material/fluidmatrixinteractions/mp/mpadapter.hh
index 82ab9c6eb5bc1e8bf6cff21e2dce1760fc7c1eae..050135d640b02f46b8877739fd23e640ae56c5da 100644
--- a/dumux/material/fluidmatrixinteractions/mp/mpadapter.hh
+++ b/dumux/material/fluidmatrixinteractions/mp/mpadapter.hh
@@ -24,8 +24,8 @@
  * Makes the capillary pressure-saturation relations
  * available under the M-phase API for material laws
  */
-#ifndef DUMUX_MP_2P_ADAPTER_HH
-#define DUMUX_MP_2P_ADAPTER_HH
+#ifndef DUMUX_MP_ADAPTER_HH
+#define DUMUX_MP_ADAPTER_HH
 
 #include <algorithm>
 #include <cassert>