diff --git a/doc/Changelog b/doc/Changelog
index c9e871011..47fcd9178 100644
--- a/doc/Changelog
+++ b/doc/Changelog
@@ -1,6 +1,8 @@
 10 November 2020: Wouter
 	- Fix #341: fixing a possible memory leak.
 	- Fix memory leak after fix for possible memory leak failure.
+	- Fix #343: Fail to build --with-libnghttp2 with error: 'SSIZE_MAX'
+	  undeclared.
 
 27 October 2020: Wouter
 	- In man page note that tls-cert-bundle is read before permission
diff --git a/services/listen_dnsport.c b/services/listen_dnsport.c
index 15ee6a389..10a7aec60 100644
--- a/services/listen_dnsport.c
+++ b/services/listen_dnsport.c
@@ -43,6 +43,7 @@
 #  include <sys/types.h>
 #endif
 #include <sys/time.h>
+#include <limits.h>
 #ifdef USE_TCP_FASTOPEN
 #include <netinet/tcp.h>
 #endif