diff --git a/src/app/prototest/capnp_c_bench.capnp b/src/app/prototest/capnp_c_bench.capnp
new file mode 100644
index 0000000000000000000000000000000000000000..54e0252e2a040a8885e720a313211e624a3307eb
--- /dev/null
+++ b/src/app/prototest/capnp_c_bench.capnp
@@ -0,0 +1,17 @@
+@0xad5b236043de2389;
+
+struct Benchmark {
+#	data @0 :List(Float64);
+#	nesting @1 :Nesting;
+	sensor @0 :Text;
+	time @1 :Int64;
+
+#	struct Nesting {
+#		foo @0 :Foo;
+#
+#		struct Foo {
+#			hurr @0 :Text;
+#			qwop @1 :Int64;
+#		}
+#	}
+}
diff --git a/src/app/prototest/main.cc b/src/app/prototest/main.cc
index ee907ab2a6843351dca115bda4f37c5f71a4ca96..84322acfacd009bfec1f6a41d72caa6395174082 100644
--- a/src/app/prototest/main.cc
+++ b/src/app/prototest/main.cc
@@ -123,6 +123,13 @@ kout << "}" << endl;
 	//struct Benchmark_Nesting_Foo benchmark_nesting_foo;
 	benchmark.time = ts + 1;
 
+	capn_text sensor_text;
+	sensor_text.len = 3;
+	sensor_text.str = "gps";
+	sensor_text.seg = NULL;
+
+	benchmark.sensor = sensor_text;
+
 	//benchmark.nesting = new_Benchmark_Nesting(cs);
 	//benchmark_nesting.foo = new_Benchmark_Nesting_Foo(cs);