diff --git a/userspace/libsinsp/fdinfo.h b/userspace/libsinsp/fdinfo.h
index 5e64871cce..a0ac04f2ce 100644
--- a/userspace/libsinsp/fdinfo.h
+++ b/userspace/libsinsp/fdinfo.h
@@ -31,8 +31,8 @@ class sinsp_protodecoder;
 #define CHAR_FD_IPV4_SOCK		'4'
 #define CHAR_FD_IPV6_SOCK		'6'
 #define CHAR_FD_DIRECTORY		'd'
-#define CHAR_FD_IPV4_SERVSOCK	'2'
-#define CHAR_FD_IPV6_SERVSOCK	'3'
+#define CHAR_FD_IPV4_SERVSOCK	'4'
+#define CHAR_FD_IPV6_SERVSOCK	'6'
 #define CHAR_FD_FIFO			'p'
 #define CHAR_FD_UNIX_SOCK		'u'
 #define CHAR_FD_EVENT			'e'