diff --git a/CHANGELOG.md b/CHANGELOG.md
index b13ba82c6..b77aa5c0a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-# fish 3.1b1
+# fish 3.1b1 (released January 26, 2020)
 
 ## Notable improvements and fixes
 - A new `$pipestatus` variable contains a list of exit statuses of the previous job, for each of the separate commands in a pipeline (#5632).
diff --git a/src/iothread.cpp b/src/iothread.cpp
index a2fc3c474..8fc54902a 100644
--- a/src/iothread.cpp
+++ b/src/iothread.cpp
@@ -6,6 +6,7 @@
 #include <pthread.h>
 #include <signal.h>
 #include <stdio.h>
+#include <string.h>
 #include <sys/select.h>
 #include <sys/time.h>
 #include <sys/types.h>