diff --git a/includes/class-wc-tax.php b/includes/class-wc-tax.php
index 58a63dfbe2d..348f0af3ea6 100644
--- a/includes/class-wc-tax.php
+++ b/includes/class-wc-tax.php
@@ -239,9 +239,11 @@ class WC_Tax {
 		$rates          = self::find_rates( $args );
 		$shipping_rates = array();
 
-		foreach ( $rates as $key => $rate ) {
-			if ( 'yes' === $rate['shipping'] ) {
-				$shipping_rates[ $key ] = $rate;
+		if ( is_array( $rates ) ) {
+			foreach ( $rates as $key => $rate ) {
+				if ( 'yes' === $rate['shipping'] ) {
+					$shipping_rates[ $key ] = $rate;
+				}
 			}
 		}