diff --git a/library/std/src/f32.rs b/library/std/src/f32.rs
index f51b2c24621..c16d27fa1f5 100644
--- a/library/std/src/f32.rs
+++ b/library/std/src/f32.rs
@@ -503,7 +503,7 @@ impl f32 {
         unsafe { cmath::fdimf(self, other) }
     }
 
-    /// Returns the cubic root of a number.
+    /// Returns the cube root of a number.
     ///
     /// # Examples
     ///
diff --git a/library/std/src/f64.rs b/library/std/src/f64.rs
index 8c41e448686..4c95df5ffe0 100644
--- a/library/std/src/f64.rs
+++ b/library/std/src/f64.rs
@@ -505,7 +505,7 @@ impl f64 {
         unsafe { cmath::fdim(self, other) }
     }
 
-    /// Returns the cubic root of a number.
+    /// Returns the cube root of a number.
     ///
     /// # Examples
     ///