diff --git a/specification/metrics/api.md b/specification/metrics/api.md
index d9f1b9daeb9..c4f4ddb146f 100644
--- a/specification/metrics/api.md
+++ b/specification/metrics/api.md
@@ -364,8 +364,7 @@ registration of the specific callback after its registration by some means.
 
 Every currently registered Callback associated with a set of instruments MUST
 be evaluated exactly once during collection prior to reading data for
-that set. The evaluation is identified using a combination of the
-callback itself, and the instruments set.
+that set.
 
 Callback functions MUST be documented as follows for the end user: