diff --git a/src/libstd/f32.rs b/src/libstd/f32.rs
index ab468f42b3bd..7899c422da62 100644
--- a/src/libstd/f32.rs
+++ b/src/libstd/f32.rs
@@ -832,11 +832,7 @@ impl f32 {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[inline]
     pub fn asinh(self) -> f32 {
-        if self == Self::NEG_INFINITY {
-            Self::NEG_INFINITY
-        } else {
-            (self.abs() + ((self * self) + 1.0).sqrt()).ln().copysign(self)
-        }
+        (self.abs() + ((self * self) + 1.0).sqrt()).ln().copysign(self)
     }
 
     /// Inverse hyperbolic cosine function.
diff --git a/src/libstd/f64.rs b/src/libstd/f64.rs
index c033198f021c..c663c5ffc9be 100644
--- a/src/libstd/f64.rs
+++ b/src/libstd/f64.rs
@@ -834,11 +834,7 @@ impl f64 {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[inline]
     pub fn asinh(self) -> f64 {
-        if self == Self::NEG_INFINITY {
-            Self::NEG_INFINITY
-        } else {
-            (self.abs() + ((self * self) + 1.0).sqrt()).ln().copysign(self)
-        }
+        (self.abs() + ((self * self) + 1.0).sqrt()).ln().copysign(self)
     }
 
     /// Inverse hyperbolic cosine function.