diff --git a/mypy/typeshed/stubs/mypy-extensions/mypy_extensions.pyi b/mypy/typeshed/stubs/mypy-extensions/mypy_extensions.pyi
index 7f7b9a89d8c53..2446244df46f3 100644
--- a/mypy/typeshed/stubs/mypy-extensions/mypy_extensions.pyi
+++ b/mypy/typeshed/stubs/mypy-extensions/mypy_extensions.pyi
@@ -112,6 +112,7 @@ class i64:
     def __gt__(self, x: i64) -> bool: ...
     def __index__(self) -> int: ...
     def __eq__(self, x: object) -> bool: ...
+    def __bool__(self) -> bool: ...
 
 class i32:
     @overload
@@ -148,6 +149,7 @@ class i32:
     def __gt__(self, x: i32) -> bool: ...
     def __index__(self) -> int: ...
     def __eq__(self, x: object) -> bool: ...
+    def __bool__(self) -> bool: ...
 
 class i16:
     @overload
@@ -184,6 +186,7 @@ class i16:
     def __gt__(self, x: i16) -> bool: ...
     def __index__(self) -> int: ...
     def __eq__(self, x: object) -> bool: ...
+    def __bool__(self) -> bool: ...
 
 class u8:
     @overload
@@ -220,3 +223,4 @@ class u8:
     def __gt__(self, x: u8) -> bool: ...
     def __index__(self) -> int: ...
     def __eq__(self, x: object) -> bool: ...
+    def __bool__(self) -> bool: ...