diff --git a/library/compiler-builtins/build.rs b/library/compiler-builtins/build.rs
index 6ad7f71538ef..8082131ef8cb 100644
--- a/library/compiler-builtins/build.rs
+++ b/library/compiler-builtins/build.rs
@@ -296,15 +296,6 @@ mod c {
                 ("__truncdfhf2", "truncdfhf2.c"),
                 ("__truncsfhf2", "truncsfhf2.c"),
             ]);
-
-            if target_arch == "x86" || target_arch == "x86_64" {
-                // Only add 80-bit long double sources on x86.
-                sources.extend(&[
-                    ("__divxc3", "divxc3.c"),
-                    ("__mulxc3", "mulxc3.c"),
-                    ("__powixf2", "powixf2.c"),
-                ]);
-            }
         }
 
         // When compiling in rustbuild (the rust-lang/rust repo) this library