diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7aa2c66..8f71868 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -33,7 +33,7 @@ if (NOT CLANG_TIDY STREQUAL "CLANG_TIDY-NOTFOUND")
    set(CMAKE_CXX_CLANG_TIDY ${CLANG_TIDY} -checks=bugprone-*,modernize-*)
 endif()
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -pthread -fPIC")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Werror -pthread -fPIC")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
diff --git a/util/extension_list.cpp b/util/extension_list.cpp
index 17850bf..f5715a2 100644
--- a/util/extension_list.cpp
+++ b/util/extension_list.cpp
@@ -55,7 +55,7 @@ VkResult extension_list::add(const char *const *extensions, size_t count)
       if (len < sizeof(dst.extensionName))
       {
          int chars_printed = snprintf(dst.extensionName, len + 1, "%s", extensions[i]);
-         if (chars_printed >= 0 && static_cast<size_t>(chars_printed) == len)
+         if (chars_printed >= 0 && (static_cast<size_t>(chars_printed) == len))
          {
             success = true;
          }