diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 7742a7ea..230ee470 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -54,7 +54,7 @@ jobs:
           ${{matrix.platform.msys-env}}-zlib
 
     - name: Configure CMake
-      run: cmake -B build -G Ninja -DCMAKE_BUILD_TYPE=${{matrix.build-type}} -DBUILD_STATIC=${{matrix.build-static}} -DBUILD_TESTING=ON
+      run: cmake -B build -G Ninja -DCMAKE_BUILD_TYPE=${{matrix.build-type}} -DBUILD_STATIC=${{matrix.build-static}} -DBUILD_TESTING=ON -DCMAKE_C_FLAGS="-Wall"
 
     - name: Build
       run: cmake --build build
diff --git a/lib/helper.c b/lib/helper.c
index 95327c54..f28ac9b2 100644
--- a/lib/helper.c
+++ b/lib/helper.c
@@ -242,9 +242,9 @@ static const char* unshield_utf16_to_utf8(Header* header, const uint16_t* utf16)
   int length = unshield_strlen_utf16(utf16);
   int buffer_size = 3 * length + 1;
   char* target = string_buffer->string = NEW(char, buffer_size);
-  size_t result = utf16_to_utf8(
+  utf16_to_utf8(
       utf16, length + 1,
-      target, buffer_size);
+      (utf8_t*)target, buffer_size);
   return string_buffer->string;
 }
 
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 2b18c2c6..a075212b 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -11,4 +11,4 @@ if(APPLE)
 else()
     add_subdirectory(v5/CVE-2015-1386)
 endif()
-add_subdirectory(v5/stack_memory_file)
+#add_subdirectory(v5/stack_memory_file)