diff --git a/library/compiler-builtins/build.rs b/library/compiler-builtins/build.rs
index cdcbfe24cd73..fba4091124a9 100644
--- a/library/compiler-builtins/build.rs
+++ b/library/compiler-builtins/build.rs
@@ -267,10 +267,8 @@ mod c {
                 if target_arch == "x86_64" {
                     sources.extend(
                         &[
-                            "x86_64/floatdisf.c",
                             "x86_64/floatdixf.c",
                             "x86_64/floatundidf.S",
-                            "x86_64/floatundisf.S",
                             "x86_64/floatundixf.S",
                         ],
                     );