diff --git a/src/librustc_codegen_llvm/common.rs b/src/librustc_codegen_llvm/common.rs
index 9fdc93c3ff0..3b2701b893b 100644
--- a/src/librustc_codegen_llvm/common.rs
+++ b/src/librustc_codegen_llvm/common.rs
@@ -170,8 +170,7 @@ impl CodegenCx<'ll, 'tcx> {
     pub fn const_get_real(&self, v: &'ll Value) -> Option<(f64, bool)> {
         unsafe {
             if self.is_const_real(v) {
-                #[allow(deprecated)]
-                let mut loses_info: llvm::Bool = ::std::mem::uninitialized();
+                let mut loses_info: llvm::Bool = 0;
                 let r = llvm::LLVMConstRealGetDouble(v, &mut loses_info);
                 let loses_info = if loses_info == 1 { true } else { false };
                 Some((r, loses_info))