diff --git a/CMakeLists.txt b/CMakeLists.txt
index c33a54b..046eb21 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,6 +12,7 @@ set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -DNDEBUG")
 if(NOT MSVC)
   set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O2")
+  set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_DEBUG} -g -rdynamic")
 endif()
 
 if (MSVC)
diff --git a/include/libimp/log.h b/include/libimp/log.h
index 34a8190..92ea435 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -92,7 +92,8 @@ class LIBIMP_EXPORT printer {
 public:
   printer() noexcept = default;
 
-  template <typename T>
+  template <typename T, 
+            typename = std::enable_if_t<!std::is_same<printer, T>::value>>
   printer(T &p) noexcept
     : objp_  (static_cast<void *>(&p))
     , vtable_(detail_log::traits<T>::make_vtable()) {}