diff --git a/src/prelude.jl b/src/prelude.jl
index 1eea8211..1709f650 100644
--- a/src/prelude.jl
+++ b/src/prelude.jl
@@ -1,4 +1,4 @@
-const NANSAFE_MODE_ENABLED = false
+const NANSAFE_MODE_ENABLED = true
 
 const AMBIGUOUS_TYPES = (AbstractFloat, Irrational, Integer, Rational, Real, RoundingMode)