diff --git a/rustfst/src/semirings/mod.rs b/rustfst/src/semirings/mod.rs
index 6312db0d7..dcdf216dd 100644
--- a/rustfst/src/semirings/mod.rs
+++ b/rustfst/src/semirings/mod.rs
@@ -16,7 +16,6 @@ mod string_weight;
 mod tropical_weight;
 mod union_weight;
 pub(crate) mod utils_float;
-pub use utils_float::float_approx_equal;
 
 pub use self::boolean_weight::BooleanWeight;
 pub use self::gallic_weight::{
diff --git a/rustfst/src/semirings/utils_float.rs b/rustfst/src/semirings/utils_float.rs
index 059f25003..0fc9f14ff 100644
--- a/rustfst/src/semirings/utils_float.rs
+++ b/rustfst/src/semirings/utils_float.rs
@@ -1,3 +1,3 @@
-pub fn float_approx_equal(w1: f32, w2: f32, delta: f32) -> bool {
-    (w1 <= w2 + delta) && (w2 <= w1 + delta)
+pub(crate) fn float_approx_equal(w1: f32, w2: f32, delta: f32) -> bool {
+    (w1 - w2).abs() <= delta
 }