diff --git a/CMakeLists.txt b/CMakeLists.txt
index 400e946..67fca85 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -62,7 +62,7 @@ if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
             target_compile_options(CLI11_warnings INTERFACE "/WX")
         endif()
     else()
-        target_compile_options(CLI11_warnings INTERFACE -Wall -Wextra -pedantic -Wshadow -Wsign-conversion)
+        target_compile_options(CLI11_warnings INTERFACE -Wall -Wextra -pedantic -Wshadow -Wsign-conversion -Wswitch-enum)
         if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
             if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.9)
                 # GCC 4.8 has a false positive
diff --git a/include/CLI/Validators.hpp b/include/CLI/Validators.hpp
index 2137e95..d51d6b3 100644
--- a/include/CLI/Validators.hpp
+++ b/include/CLI/Validators.hpp
@@ -283,6 +283,13 @@ inline path_type check_path(const char *file) noexcept {
         return path_type::nonexistant;
     case std::filesystem::file_type::directory:
         return path_type::directory;
+    case std::filesystem::file_type::symlink:
+    case std::filesystem::file_type::block:
+    case std::filesystem::file_type::character:
+    case std::filesystem::file_type::fifo:
+    case std::filesystem::file_type::socket:
+    case std::filesystem::file_type::regular:
+    case std::filesystem::file_type::unknown:
     default:
         return path_type::file;
     }