diff --git a/src/event/format/json.rs b/src/event/format/json.rs
index cedbabaa3..3b6b51a51 100644
--- a/src/event/format/json.rs
+++ b/src/event/format/json.rs
@@ -183,7 +183,9 @@ fn valid_type(data_type: &DataType, value: &Value) -> bool {
         DataType::Boolean => value.is_boolean(),
         DataType::Int8 | DataType::Int16 | DataType::Int32 | DataType::Int64 => value.is_i64(),
         DataType::UInt8 | DataType::UInt16 | DataType::UInt32 | DataType::UInt64 => value.is_u64(),
-        DataType::Float16 | DataType::Float32 | DataType::Float64 => value.is_f64(),
+        DataType::Float16 | DataType::Float32 | DataType::Float64 => {
+            value.is_f64() || value.is_i64() || value.is_u64()
+        }
         DataType::Utf8 => value.is_string(),
         DataType::List(field) => {
             let data_type = field.data_type();
diff --git a/src/handlers/http/ingest.rs b/src/handlers/http/ingest.rs
index f94faefce..d6351f455 100644
--- a/src/handlers/http/ingest.rs
+++ b/src/handlers/http/ingest.rs
@@ -621,10 +621,10 @@ mod tests {
             {
                 "a": 1,
                 "b": "hello",
-                "c": 1
+                "c": 1          // All numbers can be cast into float: #989
             },
             {
-                "a": 1,
+                "a": 1.24,      // But not the other way round
                 "b": "hello",
                 "c": null
             },