diff --git a/nixos/modules/installer/tools/nixos-option.sh b/nixos/modules/installer/tools/nixos-option.sh
index 60cee2519da0..edc94d732084 100644
--- a/nixos/modules/installer/tools/nixos-option.sh
+++ b/nixos/modules/installer/tools/nixos-option.sh
@@ -228,7 +228,7 @@ else
     escapeQuotes () { eval echo "$1"; }
     nixMap escapeQuotes "$names"
   else
-    echo 1>&2 "An error occured while looking for attribute names."
+    echo 1>&2 "An error occurred while looking for attribute names."
     echo $result
   fi
 fi
diff --git a/nixos/modules/system/boot/stage-1-init.sh b/nixos/modules/system/boot/stage-1-init.sh
index 97c688ce5902..d0f4576f8112 100644
--- a/nixos/modules/system/boot/stage-1-init.sh
+++ b/nixos/modules/system/boot/stage-1-init.sh
@@ -14,7 +14,7 @@ fail() {
     # in an interactive shell.
     cat <<EOF
 
-An error occured in stage 1 of the boot process, which must mount the
+An error occurred in stage 1 of the boot process, which must mount the
 root filesystem on \`$targetRoot' and then start stage 2.  Press one
 of the following keys: