diff --git a/crates/swc_ecma_ast/src/lit.rs b/crates/swc_ecma_ast/src/lit.rs
index cef39e5b7fff1..c67d157015c57 100644
--- a/crates/swc_ecma_ast/src/lit.rs
+++ b/crates/swc_ecma_ast/src/lit.rs
@@ -353,7 +353,7 @@ impl EqIgnoreSpan for Number {
 impl Hash for Number {
     fn hash<H: Hasher>(&self, state: &mut H) {
         fn integer_decode(val: f64) -> (u64, i16, i8) {
-            let bits: u64 = unsafe { mem::transmute(val) };
+            let bits: u64 = val.to_bits();
             let sign: i8 = if bits >> 63 == 0 { 1 } else { -1 };
             let mut exponent: i16 = ((bits >> 52) & 0x7ff) as i16;
             let mantissa = if exponent == 0 {