diff --git a/src/stdplus/exception.cpp b/src/stdplus/exception.cpp
index 4635e84..c969295 100644
--- a/src/stdplus/exception.cpp
+++ b/src/stdplus/exception.cpp
@@ -1,6 +1,7 @@
 #include <stdplus/exception.hpp>
 
 // These will only be used if the compiler doesn't support them
+#if !__has_builtin(__builtin_LINE)
 int __builtin_LINE()
 {
     return -1;
@@ -13,6 +14,7 @@
 {
     return "<unknown>";
 }
+#endif
 
 namespace stdplus
 {
diff --git a/src/stdplus/exception.hpp b/src/stdplus/exception.hpp
index 22d9572..a7dbe8b 100644
--- a/src/stdplus/exception.hpp
+++ b/src/stdplus/exception.hpp
@@ -4,9 +4,11 @@
 #include <utility>
 
 // Forward declare builtins in case they are unsupported
+#if !__has_builtin(__builtin_LINE)
 int __builtin_LINE();
 const char* __builtin_FILE();
 const char* __builtin_FUNCTION();
+#endif
 
 namespace stdplus
 {