diff --git a/src/libstd/f32.rs b/src/libstd/f32.rs
index 2fabe30fa936..a5e28722054a 100644
--- a/src/libstd/f32.rs
+++ b/src/libstd/f32.rs
@@ -970,6 +970,7 @@ impl f32 {
     /// assert!((-3.0f32).clamp(-2.0f32, 1.0f32) == -2.0f32);
     /// assert!((0.0f32).clamp(-2.0f32, 1.0f32) == 0.0f32);
     /// assert!((2.0f32).clamp(-2.0f32, 1.0f32) == 1.0f32);
+    /// assert!((std::f32::NAN).clamp(-2.0f32, 1.0f32).is_nan()); 
     /// ```
     #[unstable(feature = "clamp", issue = "44095")]
     #[inline]
diff --git a/src/libstd/f64.rs b/src/libstd/f64.rs
index a471117f6d6f..f69c0b8aae35 100644
--- a/src/libstd/f64.rs
+++ b/src/libstd/f64.rs
@@ -892,6 +892,7 @@ impl f64 {
     /// assert!((-3.0f64).clamp(-2.0f64, 1.0f64) == -2.0f64);
     /// assert!((0.0f64).clamp(-2.0f64, 1.0f64) == 0.0f64);
     /// assert!((2.0f64).clamp(-2.0f64, 1.0f64) == 1.0f64);
+    /// assert!((std::f64::NAN).clamp(-2.0f32, 1.0f32).is_nan()); 
     /// ```
     #[unstable(feature = "clamp", issue = "44095")]
     #[inline]