diff --git a/src/wp-admin/includes/image.php b/src/wp-admin/includes/image.php
index d6e6fbd563..56dd5510dd 100644
--- a/src/wp-admin/includes/image.php
+++ b/src/wp-admin/includes/image.php
@@ -357,7 +357,7 @@ function wp_read_image_metadata( $file ) {
 		return false;
 	}
 
-	list( , , $sourceImageType ) = @getimagesize( $file );
+	list( , , $image_type ) = @getimagesize( $file );
 
 	/*
 	 * EXIF contains a bunch of data we'll probably never need formatted in ways
@@ -444,7 +444,9 @@ function wp_read_image_metadata( $file ) {
 	 *
 	 * @param array $image_types Image types to check for exif data.
 	 */
-	if ( is_callable( 'exif_read_data' ) && in_array( $sourceImageType, apply_filters( 'wp_read_image_metadata_types', array( IMAGETYPE_JPEG, IMAGETYPE_TIFF_II, IMAGETYPE_TIFF_MM ) ) ) ) {
+	$exif_image_types = apply_filters( 'wp_read_image_metadata_types', array( IMAGETYPE_JPEG, IMAGETYPE_TIFF_II, IMAGETYPE_TIFF_MM ) );
+
+	if ( is_callable( 'exif_read_data' ) && in_array( $image_type, $exif_image_types ) ) {
 		$exif = @exif_read_data( $file );
 
 		if ( ! empty( $exif['ImageDescription'] ) ) {
@@ -523,12 +525,12 @@ function wp_read_image_metadata( $file ) {
 	 * @since 2.5.0
 	 * @since 4.4.0 The `$iptc` parameter was added.
 	 *
-	 * @param array  $meta            Image meta data.
-	 * @param string $file            Path to image file.
-	 * @param int    $sourceImageType Type of image.
-	 * @param array  $iptc            IPTC data.
+	 * @param array  $meta       Image meta data.
+	 * @param string $file       Path to image file.
+	 * @param int    $image_type Type of image, one of the `IMAGETYPE_XXX` constants.
+	 * @param array  $iptc       IPTC data.
 	 */
-	return apply_filters( 'wp_read_image_metadata', $meta, $file, $sourceImageType, $iptc );
+	return apply_filters( 'wp_read_image_metadata', $meta, $file, $image_type, $iptc );
 
 }