diff --git a/vlib/readline/readline.v b/vlib/readline/readline.v
index 80c6387816..e611337e18 100644
--- a/vlib/readline/readline.v
+++ b/vlib/readline/readline.v
@@ -41,17 +41,3 @@ mut:
 	search_index      int
 	is_tty            bool
 }
-
-// get_prompt_offset computes the length of the `prompt` `string` argument.
-fn get_prompt_offset(prompt string) int {
-	mut len := 0
-	for i := 0; i < prompt.len; i++ {
-		if prompt[i] == `\e` {
-			for ; i < prompt.len && prompt[i] != `m`; i++ {
-			}
-		} else {
-			len = len + 1
-		}
-	}
-	return prompt.len - len
-}
diff --git a/vlib/readline/readline_linux.c.v b/vlib/readline/readline_linux.c.v
index eecbfc8c7c..b2624a06ca 100644
--- a/vlib/readline/readline_linux.c.v
+++ b/vlib/readline/readline_linux.c.v
@@ -333,6 +333,20 @@ fn calculate_screen_position(x_in int, y_in int, screen_columns int, char_count
 	return out
 }
 
+// get_prompt_offset computes the length of the `prompt` `string` argument.
+fn get_prompt_offset(prompt string) int {
+	mut len := 0
+	for i := 0; i < prompt.len; i++ {
+		if prompt[i] == `\e` {
+			for ; i < prompt.len && prompt[i] != `m`; i++ {
+			}
+		} else {
+			len = len + 1
+		}
+	}
+	return prompt.len - len
+}
+
 // refresh_line redraws the current line, including the prompt.
 fn (mut r Readline) refresh_line() {
 	mut end_of_input := [0, 0]