diff --git a/arrow/src/datatypes/datatype.rs b/arrow/src/datatypes/datatype.rs
index 895e5cc67c3..d0c9bb6920c 100644
--- a/arrow/src/datatypes/datatype.rs
+++ b/arrow/src/datatypes/datatype.rs
@@ -238,7 +238,7 @@ pub const MAX_DECIMAL_FOR_EACH_PRECISION: [i128; 38] = [
     99999999999999999999999999999999999,
     999999999999999999999999999999999999,
     9999999999999999999999999999999999999,
-    170141183460469231731687303715884105727,
+    99999999999999999999999999999999999999,
 ];
 
 /// `MIN_DECIMAL_FOR_EACH_PRECISION[p]` holds the minimum `i128` value
@@ -281,7 +281,7 @@ pub const MIN_DECIMAL_FOR_EACH_PRECISION: [i128; 38] = [
     -99999999999999999999999999999999999,
     -999999999999999999999999999999999999,
     -9999999999999999999999999999999999999,
-    -170141183460469231731687303715884105728,
+    -99999999999999999999999999999999999999,
 ];
 
 /// The maximum precision for [DataType::Decimal] values