diff --git a/docs/api/structures/upload-file-system.md b/docs/api/structures/upload-file-system.md
index d62b0a8ba788..dee996fbae63 100644
--- a/docs/api/structures/upload-file-system.md
+++ b/docs/api/structures/upload-file-system.md
@@ -6,4 +6,4 @@
 * `length` Integer - Number of bytes to read from `offset`.
   Defaults to `0`.
 * `modificationTime` Double - Last Modification time in
-  number of seconds sine the UNIX epoch.
+  number of seconds since the UNIX epoch.
diff --git a/docs/api/structures/upload-file.md b/docs/api/structures/upload-file.md
index 8a2197301444..ae231bdaf895 100644
--- a/docs/api/structures/upload-file.md
+++ b/docs/api/structures/upload-file.md
@@ -6,4 +6,4 @@
 * `length` Integer - Number of bytes to read from `offset`.
   Defaults to `0`.
 * `modificationTime` Double - Last Modification time in
-  number of seconds sine the UNIX epoch.
+  number of seconds since the UNIX epoch.