diff --git a/spring-cloud-sleuth.html b/spring-cloud-sleuth.html
index 24b9c0c9d..6d842cbf4 100644
--- a/spring-cloud-sleuth.html
+++ b/spring-cloud-sleuth.html
@@ -1657,6 +1657,20 @@ Always clean after you create a span! Don’t forget to close a span if you
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Important
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+If your span contains a name greater than 50 chars, then that name will
+be truncated to 50 chars. Your names have to be explicit and concrete. Big names lead to
+latency issues and sometimes even thrown exceptions.
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