diff --git a/include/nameof.hpp b/include/nameof.hpp
index fcb4798..dc2a1ba 100644
--- a/include/nameof.hpp
+++ b/include/nameof.hpp
@@ -29,8 +29,8 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE  OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
-#ifndef NAMEOF_HPP
-#define NAMEOF_HPP
+#ifndef NEARGYE_NAMEOF_HPP
+#define NEARGYE_NAMEOF_HPP
 
 #include <array>
 #include <cstddef>
@@ -274,4 +274,4 @@ template <typename T>
 // Obtains string name of variable type.
 #define NAMEOF_VAR_TYPE(...) ::nameof::nameof_type<decltype(__VA_ARGS__)>()
 
-#endif // NAMEOF_HPP
+#endif // NEARGYE_NAMEOF_HPP