diff --git a/ggml/src/ggml-metal/ggml-metal-ops.cpp b/ggml/src/ggml-metal/ggml-metal-ops.cpp
index 2a14cd0c2..597d5300c 100644
--- a/ggml/src/ggml-metal/ggml-metal-ops.cpp
+++ b/ggml/src/ggml-metal/ggml-metal-ops.cpp
@@ -2476,7 +2476,8 @@ static int ggml_metal_op_mul_mat_mma(ggml_metal_op_t ctx, int idx) {
 
     if (fuse_add) {
         dst = ctx->node(idx + n_fuse - 1);
-        res = dst->src[0]->op == GGML_OP_MUL_MAT ? dst->src[1] : dst->src[0];
+        // the residual is the other operand of the ADD, by identity: it can itself be a MUL_MAT output
+        res = dst->src[0] == op ? dst->src[1] : dst->src[0];
     }
 
     auto pipeline = ggml_metal_library_get_pipeline_mul_mv_mma_auto(lib, op, fuse_add);