diff --git a/src/wp-includes/class-http.php b/src/wp-includes/class-http.php
index 2fd4c54ea6..c7a09cfc40 100644
--- a/src/wp-includes/class-http.php
+++ b/src/wp-includes/class-http.php
@@ -436,7 +436,7 @@ class WP_Http {
 		foreach ( $cookies as $name => $value ) {
 			if ( $value instanceof WP_Http_Cookie ) {
 				$cookie_jar[ $value->name ] = new Requests_Cookie( $value->name, $value->value, $value->get_attributes() );
-			} elseif ( is_string( $value ) ) {
+			} elseif ( is_scalar( $value ) ) {
 				$cookie_jar[ $name ] = new Requests_Cookie( $name, $value );
 			}
 		}
diff --git a/tests/phpunit/tests/http/http.php b/tests/phpunit/tests/http/http.php
index 74eda29e21..ed0b9eeefb 100644
--- a/tests/phpunit/tests/http/http.php
+++ b/tests/phpunit/tests/http/http.php
@@ -118,4 +118,35 @@ class Tests_HTTP_HTTP extends WP_UnitTestCase {
 		$this->assertEquals( array_keys( $wp_header_to_desc ), array_values( $constants ) );
 
 	}
+
+	/**
+	 * @ticket 37768
+	 */
+	public function test_normalize_cookies_scalar_values() {
+		$http = _wp_http_get_object();
+
+		$cookies = array(
+			'x'   => 'foo',
+			'y'   => 2,
+			'z'   => 0.45,
+			'foo' => array( 'bar' ),
+		);
+
+		$cookie_jar = $http->normalize_cookies( array(
+			'x'   => 'foo',
+			'y'   => 2,
+			'z'   => 0.45,
+			'foo' => array( 'bar' ),
+		) );
+
+		$this->assertInstanceOf( 'Requests_Cookie_Jar', $cookie_jar );
+
+		foreach( array_keys( $cookies ) as $cookie ) {
+			if ( 'foo' === $cookie ) {
+				$this->assertFalse( isset( $cookie_jar[ $cookie ] ) );
+			} else {
+				$this->assertInstanceOf( 'Requests_Cookie', $cookie_jar[ $cookie ] );
+			}
+		}
+	}
 }