WW-5321 Fixes typo
diff --git a/source/core-developers/file-upload.md b/source/core-developers/file-upload.md
index a16ba1a..9b53b6c 100644
--- a/source/core-developers/file-upload.md
+++ b/source/core-developers/file-upload.md
@@ -312,7 +312,7 @@
```
This options prevents attacks, which consists of multiple large objects in the multipart request. Such attack can exhaust
-the available memory and finally produce `OutOfMemoryException`. If the limit is too low you can increase it but defining
+the available memory and finally produce `OutOfMemoryException`. If the limit is too low you can increase it by defining
the following constant in `struts.xml`:
```xml
