diff --git a/fixed_wide/src/tests.rs b/fixed_wide/src/tests.rs
index 43fa2ab..2f9aaa6 100644
--- a/fixed_wide/src/tests.rs
+++ b/fixed_wide/src/tests.rs
@@ -65,7 +65,7 @@ fn test_sqrt_zero(){
 #[test]
 fn test_sqrt_low(){
 	let a=I32F32::HALF;
-	let b=a*a;
+	let b=a.fixed_mul(a);
 	assert_eq!(b.sqrt(),a);
 }
 fn find_equiv_sqrt_via_f64(n:I32F32)->I32F32{