diff --git a/parquet/src/schema/types.rs b/parquet/src/schema/types.rs
index 0347f7da46d..5291fa04ae7 100644
--- a/parquet/src/schema/types.rs
+++ b/parquet/src/schema/types.rs
@@ -556,7 +556,9 @@ impl<'a> PrimitiveTypeBuilder<'a> {
                 }
             }
             PhysicalType::FIXED_LEN_BYTE_ARRAY => {
-                let length = self.length.checked_mul(8).unwrap_or(i32::MAX);
+                let length = self.length.checked_mul(8).ok_or(
+                    general_err!("Invalid length {} for Decimal", self.length)
+                )?;
                 let max_precision = (2f64.powi(length - 1) - 1f64).log10().floor() as i32;
 
                 if self.precision > max_precision {