diff --git a/src/wp-admin/includes/image.php b/src/wp-admin/includes/image.php
index 12f38049dc..fe7c691e7c 100644
--- a/src/wp-admin/includes/image.php
+++ b/src/wp-admin/includes/image.php
@@ -863,12 +863,7 @@ function file_is_valid_image( $path ) {
  * @return bool True if suitable, false if not suitable.
  */
 function file_is_displayable_image( $path ) {
-	$displayable_image_types = array( IMAGETYPE_GIF, IMAGETYPE_JPEG, IMAGETYPE_PNG, IMAGETYPE_BMP );
-
-	// IMAGETYPE_ICO is only defined in PHP 5.3+.
-	if ( defined( 'IMAGETYPE_ICO' ) ) {
-		$displayable_image_types[] = IMAGETYPE_ICO;
-	}
+	$displayable_image_types = array( IMAGETYPE_GIF, IMAGETYPE_JPEG, IMAGETYPE_PNG, IMAGETYPE_BMP, IMAGETYPE_ICO );
 
 	$info = @getimagesize( $path );
 	if ( empty( $info ) ) {