diff --git a/src/struct.ts b/src/struct.ts
index 55a319b..f89fd96 100644
--- a/src/struct.ts
+++ b/src/struct.ts
@@ -190,8 +190,11 @@ export class Struct {
             } else if (i === this.#properties.length) {
                 // End Of Structure Padding
                 if (this.#size !== null && lastProperty) {
-                    const realSize = this.#roundSize(lastProperty.propertyOffset() + lastProperty.propertySize());
-                    neededPadding = this.#size - realSize;
+                    const realSize = lastProperty.propertyOffset() + lastProperty.propertySize();
+                    const realRoundedSize = this.#roundSize(realSize);
+                    if (realRoundedSize !== this.#size) {
+                        neededPadding = this.#size - realSize;
+                    }
                 }
             } else {
                 // Inner Structure Padding