diff --git a/prometheus/histogram.go b/prometheus/histogram.go
index 3a5aac7..d4ea301 100644
--- a/prometheus/histogram.go
+++ b/prometheus/histogram.go
@@ -607,7 +607,7 @@ func NewConstHistogram(
 }
 
 // MustNewConstHistogram is a version of NewConstHistogram that panics where
-// NewConstMetric would have returned an error.
+// NewConstHistogram would have returned an error.
 func MustNewConstHistogram(
 	desc *Desc,
 	count uint64,