diff --git a/source/sysak.c b/source/sysak.c
index 67e0db5dd9fc11b365dba52e6695c72354d6aa8e..db9713610bdf4fca887ff62a6abb1cec827b6eed 100644
--- a/source/sysak.c
+++ b/source/sysak.c
@@ -244,7 +244,7 @@ static bool get_region(char *region)
         printf("cmd line end\n");
         return 0;
     }
-    fread(region, 1,512, res);
+    fread(region, 1, MAX_NAME_LEN, res);
     pclose(res);
     return 0;
 }