diff --git a/stdlib/math.pyi b/stdlib/math.pyi
index 0c2fd4aba..0e6565fcf 100644
--- a/stdlib/math.pyi
+++ b/stdlib/math.pyi
@@ -123,3 +123,6 @@ def trunc(x: _SupportsTrunc[_T], /) -> _T: ...
 
 if sys.version_info >= (3, 9):
     def ulp(x: _SupportsFloatOrIndex, /) -> float: ...
+
+if sys.version_info >= (3, 13):
+    def fma(x: _SupportsFloatOrIndex, y: _SupportsFloatOrIndex, z: _SupportsFloatOrIndex) -> float: ...