diff --git a/highlighters/main/main-highlighter.zsh b/highlighters/main/main-highlighter.zsh
index bf76e98..483d285 100755
--- a/highlighters/main/main-highlighter.zsh
+++ b/highlighters/main/main-highlighter.zsh
@@ -317,7 +317,7 @@ _zsh_highlight_main_highlighter_highlight_dollar_string()
             AA=$arg[$i+1,$c-1]
             # Matching for HEX and OCT values like \0xA6, \xA6 or \012
             if [[    "$AA" =~ "^(x|X)[0-9a-fA-F]{1,2}"
-                  || "$AA" =~ "^0[0-7]{1,3}"
+                  || "$AA" =~ "^[0-7]{1,3}"
                   || "$AA" =~ "^u[0-9a-fA-F]{1,4}"
                   || "$AA" =~ "^U[0-9a-fA-F]{1,8}"
                ]]; then