diff --git a/userproject/MBody1_project/model/MBody1.cc b/userproject/MBody1_project/model/MBody1.cc
index bb04fb75e4..601e8ef61e 100644
--- a/userproject/MBody1_project/model/MBody1.cc
+++ b/userproject/MBody1_project/model/MBody1.cc
@@ -147,9 +147,7 @@ void modelDefinition(NNmodel &model)
 #else
     GENN_PREFERENCES::optimizeCode = true;
 #endif // DEBUG
-    GENN_PREFERENCES::optimizeCode = false;
-    GENN_PREFERENCES::userNvccFlags= " -O3 -use_fast_math -Xcompiler \"-ffast-math\"";
-    GENN_PREFERENCES::userCxxFlagsGNU= " -O3";
+
     //GENN_PREFERENCES::autoChooseDevice= 0;
     //GENN_PREFERENCES::optimiseBlockSize= 0;
     //GENN_PREFERENCES::neuronBlockSize= 192;