diff --git a/Doc/library/os.rst b/Doc/library/os.rst
index a2d1936c45c..b1112656749 100644
--- a/Doc/library/os.rst
+++ b/Doc/library/os.rst
@@ -3880,7 +3880,7 @@ features:
        import os
 
        # semaphore with start value '1'
-       fd = os.eventfd(1, os.EFD_SEMAPHORE | os.EFC_CLOEXEC)
+       fd = os.eventfd(1, os.EFD_SEMAPHORE | os.EFD_CLOEXEC)
        try:
            # acquire semaphore
            v = os.eventfd_read(fd)