diff --git a/library/compiler-builtins/build.rs b/library/compiler-builtins/build.rs
index 9c23c20c9654..ab1cc4b27353 100644
--- a/library/compiler-builtins/build.rs
+++ b/library/compiler-builtins/build.rs
@@ -4991,8 +4991,6 @@ mod c {
                 "divxc3.c",
                 "extendsfdf2.c",
                 "extendhfsf2.c",
-                "floatdisf.c",
-                "floatundisf.c",
                 "int_util.c",
                 "muldc3.c",
                 "mulsc3.c",