diff --git a/src/memory.rs b/src/memory.rs
index 92b10d5..2670bd5 100644
--- a/src/memory.rs
+++ b/src/memory.rs
@@ -98,11 +98,11 @@ macro_rules! primitive_memory_value_impl {
 }
 
 primitive_memory_value_impl!(u8, 1);
-primitive_memory_value_impl!(i8, 2);
+primitive_memory_value_impl!(i8, 1);
 primitive_memory_value_impl!(u16, 2);
 primitive_memory_value_impl!(i16, 2);
 primitive_memory_value_impl!(u32, 4);
-primitive_memory_value_impl!(i32, 2);
+primitive_memory_value_impl!(i32, 4);
 
 impl<const N: usize, T: MemoryValue> MemoryValue for [T; N] {
     #[inline]