diff --git a/src/wp-includes/general-template.php b/src/wp-includes/general-template.php
index bf710041e6..6ecf8271a6 100644
--- a/src/wp-includes/general-template.php
+++ b/src/wp-includes/general-template.php
@@ -2475,6 +2475,7 @@ function paginate_links( $args = '' ) {
 
 	if ( isset( $url_parts[1] ) ) {
 		wp_parse_str( $url_parts[1], $query_args );
+		$query_args = urlencode_deep( $query_args );
 	}
 
 	$pagenum_link = remove_query_arg( array_keys( $query_args ), $pagenum_link );
diff --git a/tests/phpunit/tests/general/paginateLinks.php b/tests/phpunit/tests/general/paginateLinks.php
index df8fda1dd4..b2083bbd26 100644
--- a/tests/phpunit/tests/general/paginateLinks.php
+++ b/tests/phpunit/tests/general/paginateLinks.php
@@ -188,7 +188,10 @@ EXPECTED;
 	}
 
 	function add_query_arg( $url ) {
-		return add_query_arg( array( 'foo' => 'bar' ), $url );
+		return add_query_arg( array(
+			'foo' => 'bar',
+			's'   => 'search+term',
+		), $url );
 	}
 
 	/**
@@ -208,13 +211,13 @@ EXPECTED;
 		$document = new DOMDocument();
 		$document->preserveWhiteSpace = false;
 
-		// All links should have foo=bar arguments:
+		// All links should have foo=bar arguments and be escaped:
 		$data = array(
-			0 => home_url( '/?foo=bar' ),
-			1 => home_url( '/?foo=bar' ),
-			3 => home_url( '/?paged=3&foo=bar' ),
-			5 => home_url( '/?paged=5&foo=bar' ),
-			6 => home_url( '/?paged=3&foo=bar' ),
+			0 => home_url( '/?foo=bar&s=search+term' ),
+			1 => home_url( '/?foo=bar&s=search+term' ),
+			3 => home_url( '/?paged=3&foo=bar&s=search+term' ),
+			5 => home_url( '/?paged=5&foo=bar&s=search+term' ),
+			6 => home_url( '/?paged=3&foo=bar&s=search+term' ),
 		);
 
 		foreach ( $data as $index => $expected_href ) {