diff --git a/postject-api.h b/postject-api.h
index 14899ee..104aa34 100644
--- a/postject-api.h
+++ b/postject-api.h
@@ -27,7 +27,7 @@ struct postject_options {
   const char* pe_resource_name;
 };
 
-static void postject_options_init(struct postject_options* options) {
+inline void postject_options_init(struct postject_options* options) {
   options->elf_section_name = NULL;
   options->macho_framework_name = NULL;
   options->macho_section_name = NULL;
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 45f78e6..eacb7a5 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -1,6 +1,9 @@
 cmake_minimum_required(VERSION 3.9)
 set(CMAKE_CXX_STANDARD 11)
 
+set(CMAKE_CXX_FLAGS "-Wall -Werror")
+set(CMAKE_C_FLAGS "-Wall -Werror")
+
 project(postject-tests)
 
 add_executable(c_test test.c)