diff --git a/doc/stacktrace.asciidoc b/doc/stacktrace.asciidoc
index 934d51010..0b5d4c982 100644
--- a/doc/stacktrace.asciidoc
+++ b/doc/stacktrace.asciidoc
@@ -76,7 +76,7 @@ Server = http://qutebrowser.org/qt-debug/$arch
 Then install the packages:
 
 ----
-# pacman -Sy pyqt5-common-debug python-pyqt5-debug qt5-base-debug qt5-webkit-debug
+# pacman -Suy pyqt5-common-debug python-pyqt5-debug qt5-base-debug qt5-webkit-debug
 ----
 
 The `-debug` packages conflict with the non-debug variants - it's safe to