diff --git a/src/readSolidpkg.ts b/src/readSolidpkg.ts
index 2efc6bb..b9ae32e 100644
--- a/src/readSolidpkg.ts
+++ b/src/readSolidpkg.ts
@@ -42,7 +42,7 @@ export default function readSolidpkg(buffer: Buffer) {
   //--------------- READ CENTRAL DIR ---------------
 
   //Go to start of central dir
-  pos -= -20 - centralDirSize;
+  pos -= 20 + centralDirSize;
 
   {
     const magicNum = dv.getUint32(pos, true); pos += 4;