diff --git a/library/std/src/f128.rs b/library/std/src/f128.rs
index 89612fa747551..cff0bf4ccf4c4 100644
--- a/library/std/src/f128.rs
+++ b/library/std/src/f128.rs
@@ -1,4 +1,4 @@
-//! Constants for the `f128` double-precision floating point type.
+//! Constants for the `f128` quadruple-precision floating point type.
 //!
 //! *[See also the `f128` primitive type](primitive@f128).*
 //!
diff --git a/library/std/src/f16.rs b/library/std/src/f16.rs
index cc523c93b4de7..f6a553b1d0fa2 100644
--- a/library/std/src/f16.rs
+++ b/library/std/src/f16.rs
@@ -1,4 +1,4 @@
-//! Constants for the `f16` double-precision floating point type.
+//! Constants for the `f16` half-precision floating point type.
 //!
 //! *[See also the `f16` primitive type](primitive@f16).*
 //!