diff --git a/src/compiler/spirv/vtn_alu.c b/src/compiler/spirv/vtn_alu.c
index c6f1b18d7ec..c17c3ca880f 100644
--- a/src/compiler/spirv/vtn_alu.c
+++ b/src/compiler/spirv/vtn_alu.c
@@ -83,9 +83,9 @@ matrix_multiply(struct vtn_builder *b,
                   nir_channel(&b->nb, src1->elems[i]->def, src0_columns - 1));
       for (int j = src0_columns - 2; j >= 0; j--) {
          dest->elems[i]->def =
-            nir_ffma_old(&b->nb, src0->elems[j]->def,
-                             nir_channel(&b->nb, src1->elems[i]->def, j),
-                             dest->elems[i]->def);
+            nir_ffma_weak(&b->nb, src0->elems[j]->def,
+                                  nir_channel(&b->nb, src1->elems[i]->def, j),
+                                  dest->elems[i]->def);
       }
    }