diff --git a/opm/core/newwells.h b/opm/core/newwells.h
index 64a24faa9..48e4c5594 100644
--- a/opm/core/newwells.h
+++ b/opm/core/newwells.h
@@ -35,7 +35,7 @@ extern "C" {
 
 /** Well type indicates desired/expected well behaviour. */
 enum WellType         { INJECTOR, PRODUCER };
-/** Type of well control equation or inequality. 
+/** Type of well control equation or inequality.
  *  BHP  -> bottom hole pressure is specified.
  *  RATE -> flow rate is specified.
  */