diff --git a/minisql/src/error.rs b/minisql/src/error.rs
index 0574aff..2552f74 100644
--- a/minisql/src/error.rs
+++ b/minisql/src/error.rs
@@ -36,9 +36,9 @@ pub enum TypeConversionError {
     NumberDecodeFailed(#[from] ParseFloatError),
     #[error("failed to parse int from text")]
     IntDecodeFailed(#[from] ParseIntError),
-    #[error("uknown type with oid {oid} and size {size}")]
+    #[error("unknown type with oid {oid} and size {size}")]
     UnknownType {
         oid: i32,
-        size: i32
+        size: i16
     }
 }
diff --git a/minisql/src/type_system.rs b/minisql/src/type_system.rs
index caa85ab..03cfb13 100644
--- a/minisql/src/type_system.rs
+++ b/minisql/src/type_system.rs
@@ -53,7 +53,7 @@ impl Value {
         }
     }
 
-    pub fn type_size(&self) -> i32 {
+    pub fn type_size(&self) -> i16 {
         match self {
             Self::Number(_) => 8,
             Self::Indexable(val) => match val {
@@ -75,7 +75,7 @@ impl Value {
         }
     }
 
-    pub fn from_text_bytes(bytes: &[u8], type_oid: i32, type_size: i32) -> Result<Value, TypeConversionError> {
+    pub fn from_text_bytes(bytes: &[u8], type_oid: i32, type_size: i16) -> Result<Value, TypeConversionError> {
         match (type_oid, type_size) {
             (701, 8) => {
                 let s = std::str::from_utf8(bytes)?;