diff --git a/maths/primelib.py b/maths/primelib.py
index 2625b78d7825..a9723b308070 100644
--- a/maths/primelib.py
+++ b/maths/primelib.py
@@ -417,7 +417,7 @@ def goldbach(number: int) -> list[int]:
     loop = True
 
     while i < len_pn and loop:
-        j = i + 1
+        j = i
 
         while j < len_pn and loop:
             if prime_numbers[i] + prime_numbers[j] == number: