diff --git a/include/cpptrace/cpptrace.hpp b/include/cpptrace/cpptrace.hpp
index f6e1942..c63707c 100644
--- a/include/cpptrace/cpptrace.hpp
+++ b/include/cpptrace/cpptrace.hpp
@@ -126,8 +126,8 @@ namespace cpptrace {
 
     // utilities:
     CPPTRACE_API std::string demangle(const std::string& name);
-    CPPTRACE_API bool isatty(int fd);
     CPPTRACE_API void absorb_trace_exceptions(bool absorb);
+    CPPTRACE_API bool isatty(int fd);
 
     CPPTRACE_API extern const int stdin_fileno;
     CPPTRACE_API extern const int stderr_fileno;
diff --git a/src/cpptrace.cpp b/src/cpptrace.cpp
index df03241..beb4010 100644
--- a/src/cpptrace.cpp
+++ b/src/cpptrace.cpp
@@ -324,9 +324,9 @@ namespace cpptrace {
         return detail::isatty(fd);
     }
 
-    CPPTRACE_API const int stdin_fileno = detail::fileno(stdin);
-    CPPTRACE_API const int stdout_fileno = detail::fileno(stdout);
-    CPPTRACE_API const int stderr_fileno = detail::fileno(stderr);
+    CPPTRACE_API extern const int stdin_fileno = detail::fileno(stdin);
+    CPPTRACE_API extern const int stdout_fileno = detail::fileno(stdout);
+    CPPTRACE_API extern const int stderr_fileno = detail::fileno(stderr);
 
     namespace detail {
         std::atomic_bool absorb_trace_exceptions(true); // NOSONAR