diff --git a/library/std/src/f32.rs b/library/std/src/f32.rs
index 408244b2ce9..bed90418be1 100644
--- a/library/std/src/f32.rs
+++ b/library/std/src/f32.rs
@@ -528,7 +528,7 @@ impl f32 {
 
     /// The positive difference of two numbers.
     ///
-    /// * If `self <= other`: `0:0`
+    /// * If `self <= other`: `0.0`
     /// * Else: `self - other`
     ///
     /// # Examples
diff --git a/library/std/src/f64.rs b/library/std/src/f64.rs
index 6782b861f11..e72de05ca41 100644
--- a/library/std/src/f64.rs
+++ b/library/std/src/f64.rs
@@ -530,7 +530,7 @@ impl f64 {
 
     /// The positive difference of two numbers.
     ///
-    /// * If `self <= other`: `0:0`
+    /// * If `self <= other`: `0.0`
     /// * Else: `self - other`
     ///
     /// # Examples