diff --git a/sandboxed_api/examples/hello_sapi/BUILD.bazel b/sandboxed_api/examples/hello_sapi/BUILD.bazel
index 943e636..20358ad 100644
--- a/sandboxed_api/examples/hello_sapi/BUILD.bazel
+++ b/sandboxed_api/examples/hello_sapi/BUILD.bazel
@@ -30,6 +30,7 @@ sapi_library(
     functions = [
         "AddTwoIntegers",
     ],
+    generator_version = 1,
     input_files = ["hello_lib.cc"],
     lib = ":hello_lib",
     lib_name = "Hello",
diff --git a/sandboxed_api/examples/stringop/BUILD.bazel b/sandboxed_api/examples/stringop/BUILD.bazel
index 3f70d86..9ef9be8 100644
--- a/sandboxed_api/examples/stringop/BUILD.bazel
+++ b/sandboxed_api/examples/stringop/BUILD.bazel
@@ -54,6 +54,7 @@ sapi_library(
         "violate",
         "get_raw_c_string",
     ],
+    generator_version = 1,
     input_files = ["stringop.cc"],
     lib = ":stringop",
     lib_name = "Stringop",
diff --git a/sandboxed_api/examples/sum/BUILD.bazel b/sandboxed_api/examples/sum/BUILD.bazel
index fdd967b..bb5959e 100644
--- a/sandboxed_api/examples/sum/BUILD.bazel
+++ b/sandboxed_api/examples/sum/BUILD.bazel
@@ -60,6 +60,7 @@ sapi_library(
         "sleep_for_sec",
         "sumproto",
     ],
+    generator_version = 1,
     input_files = [
         "sum.c",
         "sum_cpp.cc",
diff --git a/sandboxed_api/examples/zlib/BUILD.bazel b/sandboxed_api/examples/zlib/BUILD.bazel
index a727c8a..b6403e2 100644
--- a/sandboxed_api/examples/zlib/BUILD.bazel
+++ b/sandboxed_api/examples/zlib/BUILD.bazel
@@ -28,6 +28,7 @@ sapi_library(
         "deflate",
         "deflateEnd",
     ],
+    generator_version = 1,
     lib = "@net_zlib//:zlib",
     lib_name = "Zlib",
     namespace = "sapi::zlib",
diff --git a/sandboxed_api/tools/generator2/BUILD.bazel b/sandboxed_api/tools/generator2/BUILD.bazel
index 1b8436e..cce8dae 100644
--- a/sandboxed_api/tools/generator2/BUILD.bazel
+++ b/sandboxed_api/tools/generator2/BUILD.bazel
@@ -60,6 +60,7 @@ cc_library(
 # Targets for testing if generated code compiles
 sapi_library(
     name = "tests_sapi_generator",
+    generator_version = 1,
     input_files = [
         "testdata/tests.cc",
         "testdata/tests2.cc",