diff --git a/mod_log_ipmask.c b/mod_log_ipmask.c
index aa2e8ae..14c03d2 100755
--- a/mod_log_ipmask.c
+++ b/mod_log_ipmask.c
@@ -40,8 +40,8 @@
 #include "mod_log_config.h"
 
 
-#define DEFAULT_FILTER_BITS_V4 16
-#define DEFAULT_FILTER_BITS_V6 32
+#define DEFAULT_FILTER_BITS_V4 24
+#define DEFAULT_FILTER_BITS_V6 48
 
 static const char *V4_PFX = "\0\0\0\0\0\0\0\0\0\0\377\377";