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-rw-r--r--src/libstd/sys/unix/cmath.rs4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/libstd/sys/unix/cmath.rs b/src/libstd/sys/unix/cmath.rs
index f6bb58934fc..2916ebe4440 100644
--- a/src/libstd/sys/unix/cmath.rs
+++ b/src/libstd/sys/unix/cmath.rs
@@ -1,9 +1,9 @@
 #![cfg(not(test))]
 
-use libc::{c_float, c_double};
+use libc::{c_double, c_float};
 
 #[link_name = "m"]
-extern {
+extern "C" {
     pub fn acos(n: c_double) -> c_double;
     pub fn acosf(n: c_float) -> c_float;
     pub fn asin(n: c_double) -> c_double;