diff --git a/src/unity.c b/src/unity.c
index 660bfd6..9883fd7 100644
--- a/src/unity.c
+++ b/src/unity.c
@@ -327,7 +327,7 @@ void UnityPrintNumber(const UNITY_INT number_to_print)
     {
         /* A negative number, including MIN negative */
         UNITY_OUTPUT_CHAR('-');
-        number = (UNITY_UINT)-number_to_print;
+        number = (~number) + 1;
     }
     UnityPrintNumberUnsigned(number);
 }