diff --git a/stdlib/3/inspect.pyi b/stdlib/3/inspect.pyi
index fa751759a..0f7af374c 100644
--- a/stdlib/3/inspect.pyi
+++ b/stdlib/3/inspect.pyi
@@ -23,7 +23,7 @@ def ismodule(object: object) -> bool: ...
 def isclass(object: object) -> bool: ...
 def ismethod(object: object) -> bool: ...
 def isfunction(object: object) -> bool: ...
-def isisgeneratorfunction(object: object) -> bool: ...
+def isgeneratorfunction(object: object) -> bool: ...
 def isgenerator(object: object) -> bool: ...
 
 # Python 3.5+