diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 290c95f9..15d9b597 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -25,7 +25,8 @@ endif(MSVC)
 target_compile_features(clang-umllib INTERFACE cxx_std_17)
 target_compile_options(clang-umllib PRIVATE
         $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:GNU>>:
-        -Werror -Wall -Wextra -Wno-unused-parameter -Wno-unused-private-field>
+        -Werror -Wall -Wextra -Wno-unused-parameter -Wno-unused-private-field
+        -Wno-deprecated-declarations>
         $<$<CXX_COMPILER_ID:MSVC>:/MP /W1 /bigobj /wd4291 /wd4624 /wd4244>)
 target_compile_definitions(clang-umllib PRIVATE
         $<$<CXX_COMPILER_ID:MSVC>:
@@ -39,7 +40,8 @@ add_executable(clang-uml ${MAIN_SOURCE_FILE})
 target_compile_features(clang-uml PUBLIC cxx_std_17)
 target_compile_options(clang-uml PRIVATE
         $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:GNU>>:
-        -Werror -Wall -Wextra -Wno-unused-parameter -Wno-unused-private-field>
+        -Werror -Wall -Wextra -Wno-unused-parameter -Wno-unused-private-field
+        -Wno-deprecated-declarations>
         $<$<CXX_COMPILER_ID:MSVC>:/MP /W1 /bigobj /wd4291 /wd4624 /wd4244>)
 target_link_libraries(clang-uml
         ${YAML_CPP_LIBRARIES}
diff --git a/src/class_diagram/visitor/translation_unit_visitor.cc b/src/class_diagram/visitor/translation_unit_visitor.cc
index 0364c88b..99071c7e 100644
--- a/src/class_diagram/visitor/translation_unit_visitor.cc
+++ b/src/class_diagram/visitor/translation_unit_visitor.cc
@@ -897,8 +897,12 @@ void translation_unit_visitor::
             desugared_atsp = deduced_type->getDeducedType();
     }
 
-    const auto *deduced_record_type =
-        desugared_atsp->getAs<clang::RecordType>();
+    if (desugared_atsp.isNull())
+        return;
+
+    const auto *deduced_record_type = desugared_atsp->isRecordType()
+        ? desugared_atsp->getAs<clang::RecordType>()
+        : nullptr;
 
     if (deduced_record_type != nullptr) {
         if (auto *deduced_auto_decl =