diff --git a/stubs/psutil/psutil/__init__.pyi b/stubs/psutil/psutil/__init__.pyi
index 6c4fda89160f..0252546653c9 100644
--- a/stubs/psutil/psutil/__init__.pyi
+++ b/stubs/psutil/psutil/__init__.pyi
@@ -459,7 +459,13 @@ def cpu_stats() -> _ntp.scpustats: ...
 def getloadavg() -> tuple[float, float, float]: ...
 def virtual_memory() -> _ntp.svmem: ...
 def swap_memory() -> _ntp.sswap: ...
-def disk_usage(path: str) -> _ntp.sdiskusage: ...
+
+if sys.platform == "win32":
+    def disk_usage(path: str | bytes) -> _ntp.sdiskusage: ...
+
+else:
+    def disk_usage(path: StrOrBytesPath) -> _ntp.sdiskusage: ...
+
 def disk_partitions(all: bool = False) -> list[_ntp.sdiskpart]: ...
 
 # TODO: Incorrect sdiskio for BSD systems: