diff --git a/debian/changelog b/debian/changelog
index c5a007d09..11a761170 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -23,6 +23,7 @@ ikiwiki (3.20150330) UNRELEASED; urgency=medium
   * Add a public-domain email icon from tango-icon-theme
   * Populate pagectime from either mtime or inode change time,
     whichever is older, again for more reproducible builds
+  * debian: build the docwiki with LC_ALL=C.UTF-8 and TZ=UTC
 
  -- Joey Hess <id@joeyh.name>  Tue, 28 Apr 2015 12:24:08 -0400
 
diff --git a/debian/rules b/debian/rules
index 9cb2a8adc..cf3087d1d 100755
--- a/debian/rules
+++ b/debian/rules
@@ -1,6 +1,6 @@
 #!/usr/bin/make -f
 %:
-	dh $@
+	LC_ALL=C.UTF-8 TZ=UTC dh $@
 
 override_dh_auto_configure:
 	# keeps it out of /usr/local