diff --git a/utils/man/scoutfs-corruption.7 b/utils/man/scoutfs-corruption.7
index 32ea5a49..980c1af1 100644
--- a/utils/man/scoutfs-corruption.7
+++ b/utils/man/scoutfs-corruption.7
@@ -164,7 +164,7 @@ than the last child reference's key.
 .sp
 
 .TP
-.B SC_EXTENT_ADD_CLEANUP, SC_EXTENT_REM_CLEANUP, SC_DATA_EXTENT_TRUNC_CLEANUP, SC_DATA_EXTENT_ALLOC_CLEANUP, SC_SERVER_EXTENT_CLEANUP
+.B SC_EXTENT_ADD_CLEANUP, SC_EXTENT_REM_CLEANUP, SC_DATA_EXTENT_TRUNC_CLEANUP, SC_DATA_EXTENT_ALLOC_CLEANUP, SC_DATA_EXTENT_FALLOCATE_CLEANUP, SC_SERVER_EXTENT_CLEANUP
 
 Extents are used to track regions of blocks or files.  The process of
 modifying an extent creates and destroys intermediate extents, for
@@ -188,9 +188,10 @@ removing extents.
 The
 .I
 _DATA_EXTENT_
-cases occur in file mapping extents while either truncating (removing)
-extents from a file or while allocating extents for a newly written
-region of a file.
+cases occur in file mapping extents while truncating (removing)
+extents from a file, while allocating extents for a newly written
+region of a file, or while using fallocate to pre-allocate extents
+to the file.
 
 The
 .I
diff --git a/utils/src/format.h b/utils/src/format.h
index f9a33b83..e3aa67d7 100644
--- a/utils/src/format.h
+++ b/utils/src/format.h
@@ -622,6 +622,7 @@ enum {
 	SC_DATA_EXTENT_TRUNC_CLEANUP,
 	SC_DATA_EXTENT_ALLOC_CLEANUP,
 	SC_SERVER_EXTENT_CLEANUP,
+	SC_DATA_EXTENT_FALLOCATE_CLEANUP,
 	SC_NR_SOURCES,
 };