diff --git a/assembly/buffer/index.ts b/assembly/buffer/index.ts
index b42edf7..11ee8c5 100644
--- a/assembly/buffer/index.ts
+++ b/assembly/buffer/index.ts
@@ -23,6 +23,12 @@ export class Buffer extends Uint8Array {
     return result;
   }
 
+  writeInt8(value: i8, offset: i32 = 0): i32 {
+    if(<u32>offset > this.dataLength) throw new RangeError(E_INDEXOUTOFRANGE);
+    store<i8>(this.dataStart + offset, value);
+    return offset + 1;
+  }
+  
   readInt8(offset: i32 = 0): i8 {
     if(<u32>offset >= this.dataLength) throw new RangeError(E_INDEXOUTOFRANGE);
     return load<i8>(this.dataStart + usize(offset));
diff --git a/assembly/node.d.ts b/assembly/node.d.ts
index 52f1eba..1e4f387 100644
--- a/assembly/node.d.ts
+++ b/assembly/node.d.ts
@@ -3,6 +3,8 @@ declare class Buffer extends Uint8Array {
   static alloc(size: i32): Buffer;
   /** This method allocates a new Buffer of indicated size. This is unsafe because the data is not zeroed. */
   static allocUnsafe(size: i32): Buffer;
+  /** Writes an inputted value to the buffer, at the desired offset. */
+  writeInt8(value:i8, offset?:i32): i32;
   /** Reads a signed integer at the designated offset. */
   readInt8(offset?: i32): i8;
 }
diff --git a/tests/buffer.spec.ts b/tests/buffer.spec.ts
index d202073..eb0d0b1 100644
--- a/tests/buffer.spec.ts
+++ b/tests/buffer.spec.ts
@@ -43,6 +43,14 @@ describe("buffer", () => {
     // TODO: expectFn(() => { Buffer.allocUnsafe(BLOCK_MAXSIZE + 1); }).toThrow();
   });
 
+  test("#writeInt8", () => {
+    let buff = new Buffer(5);
+    expect<i32>(buff.writeInt8(9)).toBe(1);
+    expect<i32>(buff.writeInt8(-3,4)).toBe(5);
+    expect<i8>(buff[0]).toBe(9);
+    expect<i8>(buff[4]).toBe(-3);
+  });
+
   test("#readInt8", () => {
     let buff = new Buffer(10);
     buff[0] = 5;
@@ -57,4 +65,5 @@ describe("buffer", () => {
     //   newBuff.readInt8(5);
     // }).toThrow();
   })
+
 });