diff --git a/doc/proxy-protocol.txt b/doc/proxy-protocol.txt
index 52d7bc71c..26f86a345 100644
--- a/doc/proxy-protocol.txt
+++ b/doc/proxy-protocol.txt
@@ -223,11 +223,11 @@ flowing from the sender to the receiver :
     written in decimal representation separated by exactly one dot between each
     other. Heading zeroes are not permitted in front of numbers in order to
     avoid any possible confusion with octal numbers. IPv6 addresses must be
-    indicated as series of 4 hexadecimal digits (upper or lower case) delimited
-    by colons between each other, with the acceptance of one double colon
-    sequence to replace the largest acceptable range of consecutive zeroes. The
-    total number of decoded bits must exactly be 128. The advertised protocol
-    family dictates what format to use.
+    indicated as series of sets of 4 hexadecimal digits (upper or lower case)
+    delimited by colons between each other, with the acceptance of one double
+    colon sequence to replace the largest acceptable range of consecutive
+    zeroes. The total number of decoded bits must exactly be 128. The
+    advertised protocol family dictates what format to use.
 
   - exactly one space : " " ( \x20 )