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-rw-r--r--src/libstd/sys/sgx/cmath.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libstd/sys/sgx/cmath.rs b/src/libstd/sys/sgx/cmath.rs
index 5aabdc1c8d3..b89238f1da8 100644
--- a/src/libstd/sys/sgx/cmath.rs
+++ b/src/libstd/sys/sgx/cmath.rs
@@ -1,7 +1,7 @@
 #![cfg(not(test))]
 
 // These symbols are all defined in `compiler-builtins`
-extern {
+extern "C" {
     pub fn acos(n: f64) -> f64;
     pub fn acosf(n: f32) -> f32;
     pub fn asin(n: f64) -> f64;