diff --git a/AMDiS/src/time/RosenbrockStationary.h b/AMDiS/src/time/RosenbrockStationary.h
index e1b7229f412479c5b2005b5e29fa1e06d398ae24..e17b32239579f8bcda6d1a3c797addff46fc1f92 100644
--- a/AMDiS/src/time/RosenbrockStationary.h
+++ b/AMDiS/src/time/RosenbrockStationary.h
@@ -84,7 +84,7 @@ namespace AMDiS {
     void buildAfterCoarsen(AdaptInfo *adaptInfo, Flag flag,
 			   bool asmMatrix, bool asmVector);
 
-    void solve(AdaptInfo *adaptInfo, bool, bool);
+    void solve(AdaptInfo *adaptInfo, bool a = true, bool b = false);
 
     void setRosenbrockMethod(RosenbrockMethod *method)
     {