diff --git a/lib/std/math/fabs.zig b/lib/std/math/fabs.zig
index f1bb4be7e78124f8cfc9e13edd59794238837f63..44918e75d91c99ef770f29dc836f4b4f16400d85 100644
--- a/lib/std/math/fabs.zig
+++ b/lib/std/math/fabs.zig
@@ -21,8 +21,8 @@ pub fn fabs(x: anytype) @TypeOf(x) {
 }
 
 test "math.fabs" {
-    // TODO add support for f80 & c_longdouble here
-    inline for ([_]type{ f16, f32, f64, f128 }) |T| {
+    // TODO add support for c_longdouble here
+    inline for ([_]type{ f16, f32, f64, f80, f128 }) |T| {
         // normals
         try expect(fabs(@as(T, 1.0)) == 1.0);
         try expect(fabs(@as(T, -1.0)) == 1.0);