diff --git a/linux-ramdump-parser-v2/ramdump.py b/linux-ramdump-parser-v2/ramdump.py
index 03205466ad0a9ec7c51bdc54b93178e7c02c30f0..6a691c00c08b6bbc1aa78bd946d91375e62d23d3 100644
--- a/linux-ramdump-parser-v2/ramdump.py
+++ b/linux-ramdump-parser-v2/ramdump.py
@@ -1174,7 +1174,8 @@ class RamDump():
         cstring_addr = virt + self.field_offset(struct_name, field)
         return self.read_cstring(self.read_pointer(cstring_addr), max_length)
 
-    def read_cstring(self, addr_or_name, max_length, virtual=True, cpu=None):
+    def read_cstring(self, addr_or_name, max_length=100, virtual=True,
+                     cpu=None):
         addr = addr_or_name
         if virtual:
             if cpu is not None: