diff --git a/man2/fallocate.2 b/man2/fallocate.2
index a62706193..b4cb3516f 100644
--- a/man2/fallocate.2
+++ b/man2/fallocate.2
@@ -81,7 +81,7 @@ Preallocating zeroed blocks beyond the end of the file in this manner
 is useful for optimizing append workloads.
 .PP
 If the
-.B FALLOC_FL_UNSHARE
+.B FALLOC_FL_UNSHARE_RANGE
 flag is specified in
 .IR mode ,
 shared file data extents will be made private to the file to guarantee