diff --git a/include/mimalloc.h b/include/mimalloc.h
index d1120e9f..f057c78d 100644
--- a/include/mimalloc.h
+++ b/include/mimalloc.h
@@ -26,9 +26,9 @@ terms of the MIT license. A copy of the license can be found in the file
 
 #if (__cplusplus >= 201703)
   #define mi_decl_nodiscard    [[nodiscard]]
-#elif (__GNUC__ >= 4)         
+#elif (__GNUC__ >= 4) || defined(__clang__)  // includes clang, icc, and clang-cl
   #define mi_decl_nodiscard    __attribute__((warn_unused_result))
-#elif (_MSC_VER >= 1700)
+#elif (_MSC_VER >= 1700) 
   #define mi_decl_nodiscard    _Check_return_
 #else 
   #define mi_decl_nodiscard