micrometer: micrometer-spring-legacy won't work with older versions of Spring boot

I’m trying to use micrometer-spring-legacy (1.0.0.rc2) on a Spring Boot 1.3.3 app. But I’m seeing

Wrapped by: java.lang.NoClassDefFoundError: org/springframework/boot/web/client/RestTemplateCustomizer
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at java.lang.Class.getDeclaredMethods0(Native Method)
	at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
	at java.lang.Class.getDeclaredMethods(Class.java:1975)
	at com.domo.gateway.GatewayApplication.main(GatewayApplication.java:17) [33 skipped]

I’m guessing it is due to having an older version of Spring boot that doesn’t have the RestTemplateCustomizer.

I don’t need RestTemplate metrics. Would it make sense to add @ConditionalOnClass(name = "org.springframework.boot.web.client.RestTemplateCustomizer") to the RestTemplateMetricsConfiguration?