diff --git a/library/compiler-builtins/libm/src/math/mod.rs b/library/compiler-builtins/libm/src/math/mod.rs
index f3f533ddd218..49f5059dcb0c 100644
--- a/library/compiler-builtins/libm/src/math/mod.rs
+++ b/library/compiler-builtins/libm/src/math/mod.rs
@@ -11,6 +11,7 @@ mod acos;
 mod acosf;
 mod asin;
 mod asinf;
+mod atan;
 mod atan2;
 mod atan2f;
 mod atanf;