diff --git a/include/nlohmann/detail/macro_scope.hpp b/include/nlohmann/detail/macro_scope.hpp
index b1bd14844..fdaabec6b 100644
--- a/include/nlohmann/detail/macro_scope.hpp
+++ b/include/nlohmann/detail/macro_scope.hpp
@@ -57,6 +57,7 @@
     #define JSON_CATCH(exception) catch(exception)
     #define JSON_INTERNAL_CATCH(exception) catch(exception)
 #else
+    #include <cstdlib>
     #define JSON_THROW(exception) std::abort()
     #define JSON_TRY if(true)
     #define JSON_CATCH(exception) if(false)
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index d66a9b363..42d65e221 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -172,6 +172,7 @@ using json = basic_json<>;
     #define JSON_CATCH(exception) catch(exception)
     #define JSON_INTERNAL_CATCH(exception) catch(exception)
 #else
+    #include <cstdlib>
     #define JSON_THROW(exception) std::abort()
     #define JSON_TRY if(true)
     #define JSON_CATCH(exception) if(false)