diff --git a/CHANGELOG.md b/CHANGELOG.md
index e8332692..b156695a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,10 @@ Control panel:
 * Munin system monitoring graphs are now zoomable.
 * When a reboot is required (due to Ubuntu security updates automatically installed), a Reboot Box button now appears.
 
+Setup:
+
+* Setup dialogs did not appear correctly when connecting to SSH using Putty on Windows.
+
 v0.17b (March 1, 2016)
 ----------------------
 
diff --git a/setup/start.sh b/setup/start.sh
index 3a93ac22..09dc8956 100755
--- a/setup/start.sh
+++ b/setup/start.sh
@@ -24,6 +24,9 @@ export LC_ALL=en_US.UTF-8
 export LANG=en_US.UTF-8
 export LC_TYPE=en_US.UTF-8
 
+# Fix so line drawing characters are shown correctly in Putty on Windows. See #744.
+export NCURSES_NO_UTF8_ACS=1
+
 # Recall the last settings used if we're running this a second time.
 if [ -f /etc/mailinabox.conf ]; then
 	# Run any system migrations before proceeding. Since this is a second run,