diff --git a/src/amdis/assembler/FirstOrderGradTest.hpp b/src/amdis/assembler/FirstOrderGradTest.hpp
index cfb1e7adac531aa4a1e01fb0759246f2698870e0..5239a1d1721f81f4d8778dbb3f7d010dd3c6e808 100644
--- a/src/amdis/assembler/FirstOrderGradTest.hpp
+++ b/src/amdis/assembler/FirstOrderGradTest.hpp
@@ -20,7 +20,7 @@ namespace AMDiS
   }
 
 
-  /// first-order operator \f$ \langle\Psi, c\,\nabla\phi\rangle \f$
+  /// first-order operator \f$ \langle\nabla\psi, b\rangle \f$
   template <class LocalContext, class GridFct>
   class GridFunctionOperator<tag::gradtest, LocalContext, GridFct>
       : public GridFunctionOperatorBase<GridFunctionOperator<tag::gradtest, LocalContext, GridFct>,