diff --git a/opm/core/pressure/tpfa/ifs_tpfa.c b/opm/core/pressure/tpfa/ifs_tpfa.c
index 68d058db3..e3f4506c2 100644
--- a/opm/core/pressure/tpfa/ifs_tpfa.c
+++ b/opm/core/pressure/tpfa/ifs_tpfa.c
@@ -364,7 +364,7 @@ assemble_well_contrib(int                   nc ,
 
         if (ctrls->current < 0) {
 
-            /* Threat this well as a shut well, isolated from the domain. */
+            /* Treat this well as a shut well, isolated from the domain. */
 
             assemble_shut_well(nc, w, W, mt, h);