diff --git a/CMakeLists.txt b/CMakeLists.txt
index 62c96893..78281486 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -48,7 +48,6 @@ add_executable(Instantiator Instantiator.cpp
   src/Template.cpp)
 
 # set_target_properties(Instantiator PROPERTIES SUFFIX ${LLVM_VERSION_MAJOR})
-target_compile_options(Instantiator -Wno-return-stack-address)
 
 message(STATUS ${CMAKE_SOURCE_DIR})
 target_include_directories(Instantiator PRIVATE ${LLVM_INCLUDE_DIRS} ${CLANG_INCLUDE_DIRS} ${CMAKE_SOURCE_DIR}/include)
diff --git a/tests/Math/include/Math/CoeffUnaryOp.hpp b/tests/Math/include/Math/CoeffUnaryOp.hpp
index 35c7288c..2c9d61fd 100644
--- a/tests/Math/include/Math/CoeffUnaryOp.hpp
+++ b/tests/Math/include/Math/CoeffUnaryOp.hpp
@@ -34,7 +34,7 @@ class CoeffUnaryOp : public MatrixBase<CoeffUnaryOp<XprType_, ReturnScalar>>
     constexpr auto rows() const { return Rows; }
     constexpr auto cols() const { return Cols; }
 
-    const Scalar& operator()(std::size_t row, std::size_t col) const;
+    Scalar operator()(std::size_t row, std::size_t col) const;
 
 protected:
     const XprType& m_refexpr;
diff --git a/tests/Math/src/CoeffUnaryOp.cpp b/tests/Math/src/CoeffUnaryOp.cpp
index d7a4ddd2..0106e4c5 100644
--- a/tests/Math/src/CoeffUnaryOp.cpp
+++ b/tests/Math/src/CoeffUnaryOp.cpp
@@ -7,7 +7,7 @@
 namespace Math {
 
 template <typename XprType, typename ReturnScalar>
-const ReturnScalar& CoeffUnaryOp<XprType, ReturnScalar>::operator()(std::size_t row, std::size_t col) const
+ReturnScalar CoeffUnaryOp<XprType, ReturnScalar>::operator()(std::size_t row, std::size_t col) const
 {
     return m_func(m_refexpr(row, col));
 }