diff --git a/fuzz/fuzz_targets/cast_real.rs b/fuzz/fuzz_targets/cast_real.rs
index 65f550ec8..4ef4ab2ba 100644
--- a/fuzz/fuzz_targets/cast_real.rs
+++ b/fuzz/fuzz_targets/cast_real.rs
@@ -1,5 +1,6 @@
 #![no_main]
 use libfuzzer_sys::{fuzz_target, Corpus};
+use limbo_core::numeric::StrToF64;
 use std::error::Error;
 
 fn do_fuzz(text: String) -> Result<Corpus, Box<dyn Error>> {
@@ -10,8 +11,11 @@ fn do_fuzz(text: String) -> Result<Corpus, Box<dyn Error>> {
         })?
     };
 
-    let actual = limbo_core::numeric::atof(&text)
-        .map(|(non_nan, _)| f64::from(non_nan))
+    let actual = limbo_core::numeric::str_to_f64(&text)
+        .map(|v| {
+            let (StrToF64::Fractional(non_nan) | StrToF64::Decimal(non_nan)) =  v;
+            f64::from(non_nan)
+        })
         .unwrap_or(0.0);
 
     assert_eq!(expected, actual);