2 files changed, 10 insertions, 2 deletions
diff --git a/src/libstd/num/f32.rs b/src/libstd/num/f32.rs
index 624748f352e..94aa3d6b513 100644
--- a/src/libstd/num/f32.rs
+++ b/src/libstd/num/f32.rs
@@ -646,7 +646,10 @@ impl f32 {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[inline]
     pub fn log2(self) -> f32 {
-        unsafe { intrinsics::log2f32(self) }
+        #[cfg(target_os = "android")]
+        return ::sys::android::log2f32(self);
+        #[cfg(not(target_os = "android"))]
+        return unsafe { intrinsics::log2f32(self) };
     }
 
     /// Returns the base 10 logarithm of the number.
diff --git a/src/libstd/num/f64.rs b/src/libstd/num/f64.rs
index 6515301aefd..2beffb64d3d 100644
--- a/src/libstd/num/f64.rs
+++ b/src/libstd/num/f64.rs
@@ -546,7 +546,12 @@ impl f64 {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[inline]
     pub fn log2(self) -> f64 {
-        self.log_wrapper(|n| { unsafe { intrinsics::log2f64(n) } })
+        self.log_wrapper(|n| {
+            #[cfg(target_os = "android")]
+            return ::sys::android::log2f64(n);
+            #[cfg(not(target_os = "android"))]
+            return unsafe { intrinsics::log2f64(n) };
+        })
     }
 
     /// Returns the base 10 logarithm of the number.