diff --git a/reactos/include/psdk/imagehlp.h b/reactos/include/psdk/imagehlp.h
index 50115180d7f..54e3d04d032 100644
--- a/reactos/include/psdk/imagehlp.h
+++ b/reactos/include/psdk/imagehlp.h
@@ -106,7 +106,7 @@ typedef enum _IMAGEHLP_STATUS_REASON {
 	BindMismatchedSymbols,
 	BindSymbolsNotUpdated
 } IMAGEHLP_STATUS_REASON;
-typedef BOOL(WINAPI*PIMAGEHLP_STATUS_ROUTINE)(IMAGEHLP_STATUS_REASON,LPSTR,LPSTR,ULONG,ULONG);
+typedef BOOL(WINAPI*PIMAGEHLP_STATUS_ROUTINE)(IMAGEHLP_STATUS_REASON,PCSTR,PCSTR,ULONG_PTR,ULONG_PTR);
 typedef struct _LOADED_IMAGE {
 	PSTR ModuleName;
 	HANDLE hFile;