diff --git a/optim.opts b/optim.opts
index 68213ff0416d22029aaae15e4998fc1f864ecd12..bb7499ca78ccec1ece2c3ef82bc88b4c6623718d 100644
--- a/optim.opts
+++ b/optim.opts
@@ -14,7 +14,6 @@ GXX_WARNING_OPTS=" \
 GXX_OPTS=" \
     -fno-strict-aliasing \
     -fstrict-overflow \
-    -ffast-math \
     -fno-finite-math-only \
     -O3 \
     -march=native \