diff --git a/src/add-ons/kernel/file_systems/fat/file.c b/src/add-ons/kernel/file_systems/fat/file.c
index e17813cb0ca..aa2ed8ca6c4 100644
--- a/src/add-ons/kernel/file_systems/fat/file.c
+++ b/src/add-ons/kernel/file_systems/fat/file.c
@@ -1439,7 +1439,7 @@ dosfs_read_pages(fs_volume *_vol, fs_vnode *_node, void *_cookie, off_t pos,
 
 	while (true) {
 		struct file_io_vec fileVecs[8];
-		uint32 fileVecCount = 8;
+		size_t fileVecCount = 8;
 		bool bufferOverflow;
 		size_t bytes = bytesLeft;
 
@@ -1483,7 +1483,7 @@ dosfs_write_pages(fs_volume *_vol, fs_vnode *_node, void *_cookie, off_t pos,
 
 	while (true) {
 		struct file_io_vec fileVecs[8];
-		uint32 fileVecCount = 8;
+		size_t fileVecCount = 8;
 		bool bufferOverflow;
 		size_t bytes = bytesLeft;