diff --git a/src/network_kernels.cu b/src/network_kernels.cu
index 2b799b7d..dbf57531 100644
--- a/src/network_kernels.cu
+++ b/src/network_kernels.cu
@@ -246,7 +246,7 @@ void backward_network_gpu(network net, network_state state)
     if (net.adversarial) {
         int x_size = get_network_input_size(net)*net.batch;
         printf(" x_size = %d, original_delta = %p, original_input = %p, net.learning_rate = %d \n",
-            x_size, original_delta, original_input, x_size, net.learning_rate);
+            x_size, original_delta, original_input, net.learning_rate);
         axpy_ongpu(x_size, net.learning_rate, original_delta, 1, original_input, 1);
         constrain_min_max_ongpu(x_size, 0, 1, original_input, 1);
     }