diff --git a/config/optimize b/config/optimize
index bdf05922eb..24820dbc10 100644
--- a/config/optimize
+++ b/config/optimize
@@ -4,7 +4,7 @@ if [ "$OPTIMIZATIONS" = normal ];then
 fi
 
 if [ "$OPTIMIZATIONS" = size ];then
-  GCC_OPTIM="-Os -fexcess-precision=fast -ffast-math"
+  GCC_OPTIM="-Os -fexcess-precision=fast"
   LD_OPTIM="-Wl,--as-needed"
 fi