diff --git a/bin/opensim.sh b/bin/opensim.sh
index b0c5722c6a..aaa9649b65 100755
--- a/bin/opensim.sh
+++ b/bin/opensim.sh
@@ -3,4 +3,3 @@ ulimit -s 1048576
 # next option may improve SGen gc (for opensim only) you may also need to increase nursery size on large regions
 #export MONO_GC_PARAMS="minor=split,promotion-age=14"
 mono --desktop -O=all OpenSim.exe
-#mono --desktop -ffast_math -O=all OpenSim.exe