diff --git a/docs/specs/om/open_metrics_spec_2_0.md b/docs/specs/om/open_metrics_spec_2_0.md
index 8456bdcb3..3b8ad54b7 100644
--- a/docs/specs/om/open_metrics_spec_2_0.md
+++ b/docs/specs/om/open_metrics_spec_2_0.md
@@ -130,7 +130,9 @@ Metric values in OpenMetrics MUST be either Number or CompositeValue.
 
 ##### Number
 
-Number value MUST be either floating point or integer. Note that ingestors of the format MAY only support float64. The non-real values NaN, +Inf and -Inf MUST be supported. NaN value MUST NOT be considered a missing value, but it MAY be used to signal a division by zero.
+Number value MUST be either floating point or integer.
+
+Note that ingestors of the format MAY only support float64, for example Go's `float64` which is an IEEE 754-2008 double-precision (binary64) floating-point number with approximately 15–17 significant decimal digits of precision. The non-real values NaN, +Inf and -Inf MUST be supported. NaN value MUST NOT be considered a missing value, but it MAY be used to signal a division by zero or any other mathematical operation that yields an undefined or indeterminate result.
 
 Booleans MUST be represented as a Number value where `1` is true and `0` is false.