[ci skip] Close #5482
diff --git a/system/helpers/inflector_helper.php b/system/helpers/inflector_helper.php
index bd36c35..1c14f4a 100644
--- a/system/helpers/inflector_helper.php
+++ b/system/helpers/inflector_helper.php
@@ -63,7 +63,7 @@
 	{
 		$result = strval($str);
 
-		if ( ! is_countable($result))
+		if ( ! word_is_countable($result))
 		{
 			return $result;
 		}
@@ -128,7 +128,7 @@
 	{
 		$result = strval($str);
 
-		if ( ! is_countable($result))
+		if ( ! word_is_countable($result))
 		{
 			return $result;
 		}
@@ -226,7 +226,7 @@
 
 // --------------------------------------------------------------------
 
-if ( ! function_exists('is_countable'))
+if ( ! function_exists('word_is_countable'))
 {
 	/**
 	 * Checks if the given word has a plural version.
@@ -234,7 +234,7 @@
 	 * @param	string	$word	Word to check
 	 * @return	bool
 	 */
-	function is_countable($word)
+	function word_is_countable($word)
 	{
 		return ! in_array(
 			strtolower($word),
@@ -274,3 +274,14 @@
 		);
 	}
 }
+
+// --------------------------------------------------------------------
+
+if ( ! function_exists('is_countable'))
+{
+	function is_countable($word)
+	{
+		trigger_error('is_countable() is a native PHP function since version 7.3.0; use word_is_countable() instead', E_USER_WARNING);
+		return word_is_countable($word);
+	}
+}