diff --git a/includes/import/class-wc-product-csv-importer.php b/includes/import/class-wc-product-csv-importer.php
index 91819de3543..97c97ba19e8 100644
--- a/includes/import/class-wc-product-csv-importer.php
+++ b/includes/import/class-wc-product-csv-importer.php
@@ -222,11 +222,16 @@ class WC_Product_CSV_Importer extends WC_Product_Importer {
 			'/Download * URL/'         => 'esc_url',
 		);
 
-		$headers         = ! empty( $this->mapped_keys ) ? $this->mapped_keys : $this->raw_keys;
-		$parse_functions = array();
+		$parse_functions   = array();
+		$this->parsed_data = array();
+
+		// If we have no mapped data, abort.
+		if ( empty( $this->mapped_keys ) ) {
+			return;
+		}
 
 		// Figure out the parse function for each column.
-		foreach ( $headers as $index => $heading ) {
+		foreach ( $this->mapped_keys as $index => $heading ) {
 
 			$parse_function = 'esc_attr';
 			if ( isset( $data_formatting[ $heading ] ) ) {
@@ -247,7 +252,7 @@ class WC_Product_CSV_Importer extends WC_Product_Importer {
 		foreach ( $this->raw_data as $row ) {
 			$item = array();
 			foreach ( $row as $index => $field ) {
-				$item[ $headers[ $index ] ] = call_user_func( $parse_functions[ $index ], $field );
+				$item[ $this->mapped_keys[ $index ] ] = call_user_func( $parse_functions[ $index ], $field );
 			}
 			$this->parsed_data[] = $item;
 		}