1 files changed, 2 insertions, 0 deletions
diff --git a/src/de.rs b/src/de.rs
index 6b7c43b..b23f03f 100644
--- a/src/de.rs
+++ b/src/de.rs
@@ -1396,6 +1396,8 @@ impl<'a> Deserializer<'a> {
                 return Err(self.error(start, ErrorKind::NumberInvalid));
             }
             exponent = Some(a);
+        } else if !suffix.is_empty() {
+            return Err(self.error(start, ErrorKind::NumberInvalid));
         }
 
         let mut number = integral