diff --git a/fmt.c b/fmt.c
index 516102c..f18ec7b 100644
--- a/fmt.c
+++ b/fmt.c
@@ -52,7 +52,7 @@ void cpu_format_stack(struct cpu_t *cpu, char buffer[764]) {
             p = strcat(p, " ");
          }
          char tmp[8];
-         sprintf(tmp, "%.2X", _mem_get_byte_direct(cpu, 0x0100 + sp));
+         sprintf(tmp, "%.2X", _mem_get_byte_direct(cpu, 0x0100 + sp + 1));
          p = strcat(p, tmp);
       }
       strcat(p, "]");