diff --git a/tests/test-highlighting.zsh b/tests/test-highlighting.zsh
index f335293..91534ef 100755
--- a/tests/test-highlighting.zsh
+++ b/tests/test-highlighting.zsh
@@ -206,7 +206,7 @@ run_test() {
       local ret=$pipestatus[1] stderr=$pipestatus[2]
       if (( ! stderr )); then
         # stdout will become stderr
-	echo "Bail out! On ${(qq)1}: output on stderr"; return 1
+        echo "Bail out! On ${(qq)1}: output on stderr"; return 1
       else
         return $ret
       fi
diff --git a/zsh-syntax-highlighting.zsh b/zsh-syntax-highlighting.zsh
index 5c6b478..fd2a7c6 100644
--- a/zsh-syntax-highlighting.zsh
+++ b/zsh-syntax-highlighting.zsh
@@ -161,12 +161,12 @@ _zsh_highlight()
       (( REGION_ACTIVE )) || return
       integer min max
       if (( MARK > CURSOR )) ; then
-	min=$CURSOR max=$MARK
+        min=$CURSOR max=$MARK
       else
-	min=$MARK max=$CURSOR
+        min=$MARK max=$CURSOR
       fi
       if (( REGION_ACTIVE == 1 )); then
-	[[ $KEYMAP = vicmd ]] && (( max++ ))
+        [[ $KEYMAP = vicmd ]] && (( max++ ))
       elif (( REGION_ACTIVE == 2 )); then
         local needle=$'\n'
         # CURSOR and MARK are 0 indexed between letters like region_highlight