diff --git a/core/util.rs b/core/util.rs
index f518df6f4..4e79d151f 100644
--- a/core/util.rs
+++ b/core/util.rs
@@ -912,11 +912,10 @@ fn parse_numeric_str(text: &str) -> Result<(OwnedValueType, &str), ()> {
     let text = text.trim();
     let bytes = text.as_bytes();
 
-    if bytes.is_empty()
-        || bytes[0] == b'e'
-        || bytes[0] == b'E'
-        || (bytes[0] == b'.' && (bytes[1] == b'e' || bytes[1] == b'E'))
-    {
+    if matches!(
+        bytes,
+        [] | [b'e', ..] | [b'E', ..] | [b'.', b'e' | b'E', ..]
+    ) {
         return Err(());
     }