diff --git a/src/linalg/qr.rs b/src/linalg/qr.rs
index 683c11b8..74b4de85 100644
--- a/src/linalg/qr.rs
+++ b/src/linalg/qr.rs
@@ -170,7 +170,7 @@ where DefaultAllocator: Allocator<N, D, D> + Allocator<N, D>
         b: &Matrix<N, R2, C2, S2>,
     ) -> Option<MatrixMN<N, R2, C2>>
     where
-        S2: StorageMut<N, R2, C2>,
+        S2: Storage<N, R2, C2>,
         ShapeConstraint: SameNumberOfRows<R2, D>,
         DefaultAllocator: Allocator<N, R2, C2>,
     {