diff --git a/opm/polymer/PolymerInflow.cpp b/opm/polymer/PolymerInflow.cpp
index b280c4e55..403b6f98b 100644
--- a/opm/polymer/PolymerInflow.cpp
+++ b/opm/polymer/PolymerInflow.cpp
@@ -103,7 +103,7 @@ namespace Opm
             // names.
             int wix = 0;
             for (; wix < wells.number_of_wells; ++wix) {
-                if (wellPolymerRate_.count(wells.name[wix]) > 0) {
+                if (map_it->first == wells.name[wix]) {
                     break;
                 }
             }