diff --git a/micrometer-core/src/main/java/io/micrometer/core/instrument/binder/system/UptimeMetrics.java b/micrometer-core/src/main/java/io/micrometer/core/instrument/binder/system/UptimeMetrics.java
index 565099624a..e877286dea 100644
--- a/micrometer-core/src/main/java/io/micrometer/core/instrument/binder/system/UptimeMetrics.java
+++ b/micrometer-core/src/main/java/io/micrometer/core/instrument/binder/system/UptimeMetrics.java
@@ -63,7 +63,7 @@ public void bindTo(MeterRegistry registry) {
 
         TimeGauge.builder("process.start.time", runtimeMXBean, TimeUnit.MILLISECONDS, RuntimeMXBean::getStartTime)
             .tags(tags)
-            .description("Start time of the process since unix epoch in seconds.")
+            .description("Start time of the process since unix epoch.")
             .register(registry);
     }
 }