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-rw-r--r--src/libcore/num/mod.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libcore/num/mod.rs b/src/libcore/num/mod.rs
index 525d588d70f..3d05fd060d2 100644
--- a/src/libcore/num/mod.rs
+++ b/src/libcore/num/mod.rs
@@ -1502,7 +1502,7 @@ pub trait Float: Signed + Primitive {
 
     /// Take the square root of a number.
     ///
-    /// Returns NaN if `self` is not a non-negative number.
+    /// Returns NaN if `self` is a negative number.
     fn sqrt(self) -> Self;
     /// Take the reciprocal (inverse) square root of a number, `1/sqrt(x)`.
     fn rsqrt(self) -> Self;