diff --git a/ProcessLib/GroundwaterFlow.h b/ProcessLib/GroundwaterFlow.h
index ebd7b50e981ac59ea9a94a703194deb90b9de5c5..1c79d7e3566f6cfba4b351b69130759d0096b911 100644
--- a/ProcessLib/GroundwaterFlow.h
+++ b/ProcessLib/GroundwaterFlow.h
@@ -40,10 +40,10 @@ public:
                 });
 
         if (variable == variables.end())
-            ERR("Expected field \'%s\' not found in provided fields.",
+            ERR("Expected process variable \'%s\' not found in provided variables list.",
                 name.c_str());
 
-        DBUG("Associate hydraulic_head with field named \'%s\'.",
+        DBUG("Associate hydraulic_head with process variable \'%s\'.",
             name.c_str());
         _hydraulic_head = &*variable;