diff --git a/rpcs3/Emu/SysCalls/Modules/cellFs.cpp b/rpcs3/Emu/SysCalls/Modules/cellFs.cpp
index 223ce6cfcb..daadb68b59 100644
--- a/rpcs3/Emu/SysCalls/Modules/cellFs.cpp
+++ b/rpcs3/Emu/SysCalls/Modules/cellFs.cpp
@@ -477,11 +477,6 @@ s32 cellFsStReadStart(u32 fd, u64 offset, u64 size)
 		return CELL_FS_EBADF;
 	}
 
-	if (size > std::numeric_limits<u32>::max()) // ???
-	{
-		return CELL_FS_EINVAL;
-	}
-
 	switch (auto status = file->st_status.compare_and_swap(SSS_INITIALIZED, SSS_STARTED))
 	{
 	case SSS_NOT_INITIALIZED:
@@ -595,11 +590,6 @@ s32 cellFsStRead(u32 fd, vm::ptr<u8> buf, u64 size, vm::ptr<u64> rsize)
 		return CELL_FS_EBADF;
 	}
 
-	if (size > std::numeric_limits<u32>::max()) // ???
-	{
-		return CELL_FS_EINVAL;
-	}
-
 	if (file->st_status.read_sync() == SSS_NOT_INITIALIZED || file->st_copyless)
 	{
 		return CELL_FS_ENXIO;
@@ -667,11 +657,6 @@ s32 cellFsStReadPutCurrentAddr(u32 fd, vm::ptr<u8> addr, u64 size)
 		return CELL_FS_EBADF;
 	}
 
-	if (size > std::numeric_limits<u32>::max()) // ???
-	{
-		return CELL_FS_EINVAL;
-	}
-
 	if (file->st_status.read_sync() == SSS_NOT_INITIALIZED || !file->st_copyless)
 	{
 		return CELL_FS_ENXIO;
@@ -699,11 +684,6 @@ s32 cellFsStReadWait(u32 fd, u64 size)
 		return CELL_FS_EBADF;
 	}
 
-	if (size > std::numeric_limits<u32>::max()) // ???
-	{
-		return CELL_FS_EINVAL;
-	}
-
 	if (file->st_status.read_sync() == SSS_NOT_INITIALIZED)
 	{
 		return CELL_FS_ENXIO;
@@ -738,17 +718,12 @@ s32 cellFsStReadWaitCallback(u32 fd, u64 size, fs_st_cb_t func)
 		return CELL_FS_EBADF;
 	}
 
-	if (size > std::numeric_limits<u32>::max()) // ???
-	{
-		return CELL_FS_EINVAL;
-	}
-
 	if (file->st_status.read_sync() == SSS_NOT_INITIALIZED)
 	{
 		return CELL_FS_ENXIO;
 	}
 
-	if (!file->st_callback.compare_and_swap_test({}, { static_cast<u32>(size), func }))
+	if (!file->st_callback.compare_and_swap_test({}, { size, func }))
 	{
 		return CELL_FS_EIO;
 	}
diff --git a/rpcs3/Emu/SysCalls/lv2/sys_fs.h b/rpcs3/Emu/SysCalls/lv2/sys_fs.h
index 7466548234..bd4945cd3c 100644
--- a/rpcs3/Emu/SysCalls/lv2/sys_fs.h
+++ b/rpcs3/Emu/SysCalls/lv2/sys_fs.h
@@ -158,8 +158,9 @@ using fs_st_cb_t = vm::ptr<void(u32 xfd, u64 xsize)>;
 
 struct fs_st_cb_rec_t
 {
-	u32 size;
+	u64 size;
 	fs_st_cb_t func;
+	u32 pad;
 };
 
 struct fs_file_t