diff --git a/lib/fko_limits.h b/lib/fko_limits.h
index 7efba4b..e2621a6 100644
--- a/lib/fko_limits.h
+++ b/lib/fko_limits.h
@@ -51,7 +51,7 @@
 #define MIN_SPA_FIELDS                6
 #define MAX_SPA_FIELDS               10
 
-#define MAX_IPV4_STR_LEN             16
+#define MAX_IPV4_STR_LEN             1000
 #define MIN_IPV4_STR_LEN              7
 
 /* Misc.
